Bug 1613985 - Use default for equivalent-to-default constructors/destructors in widget. r=jmathies

Differential Revision: https://phabricator.services.mozilla.com/D66012

--HG--
extra : moz-landing-system : lando

widget/BasicEvents.h

@@ -1067,7 +1067,7 @@ class WidgetGUIEvent : public WidgetEvent {
                  EventClassID aEventClassID)
       : WidgetEvent(aIsTrusted, aMessage, aEventClassID), mWidget(aWidget) {}
 
-  WidgetGUIEvent() {}
+  WidgetGUIEvent() = default;
 
  public:
   virtual WidgetGUIEvent* AsGUIEvent() override { return this; }

widget/CompositorWidget.cpp

@@ -13,7 +13,7 @@ namespace widget {
 CompositorWidget::CompositorWidget(const layers::CompositorOptions& aOptions)
     : mOptions(aOptions) {}
 
-CompositorWidget::~CompositorWidget() {}
+CompositorWidget::~CompositorWidget() = default;
 
 already_AddRefed<gfx::DrawTarget> CompositorWidget::StartRemoteDrawing() {
   return nullptr;

widget/ContentCache.cpp

@@ -46,7 +46,7 @@ class GetRectText : public nsAutoCString {
     AppendInt(aRect.Height());
     AppendLiteral(" }");
   }
-  virtual ~GetRectText() {}
+  virtual ~GetRectText() = default;
 };
 
 class GetWritingModeName : public nsAutoCString {
@@ -62,7 +62,7 @@ class GetWritingModeName : public nsAutoCString {
     }
     AssignLiteral("Vertical (RTL)");
   }
-  virtual ~GetWritingModeName() {}
+  virtual ~GetWritingModeName() = default;
 };
 
 class GetEscapedUTF8String final : public NS_ConvertUTF16toUTF8 {

widget/GfxInfoBase.cpp

@@ -47,10 +47,10 @@ bool GfxInfoBase::sShutdownOccurred;
 
 // Observes for shutdown so that the child GfxDriverInfo list is freed.
 class ShutdownObserver : public nsIObserver {
-  virtual ~ShutdownObserver() {}
+  virtual ~ShutdownObserver() = default;
 
  public:
-  ShutdownObserver() {}
+  ShutdownObserver() = default;
 
   NS_DECL_ISUPPORTS
 
@@ -629,7 +629,7 @@ GfxInfoBase::Observe(nsISupports* aSubject, const char* aTopic,
 
 GfxInfoBase::GfxInfoBase() : mScreenPixels(INT64_MAX), mMutex("GfxInfoBase") {}
 
-GfxInfoBase::~GfxInfoBase() {}
+GfxInfoBase::~GfxInfoBase() = default;
 
 nsresult GfxInfoBase::Init() {
   InitGfxDriverInfoShutdownObserver();

widget/GfxInfoX11.h

@@ -61,7 +61,7 @@ class GfxInfo final : public GfxInfoBase {
 #endif
 
  protected:
-  ~GfxInfo() {}
+  ~GfxInfo() = default;
 
   virtual nsresult GetFeatureStatusImpl(
       int32_t aFeature, int32_t* aStatus, nsAString& aSuggestedDriverVersion,

widget/InputData.cpp

@@ -20,7 +20,7 @@ namespace mozilla {
 
 using namespace dom;
 
-InputData::~InputData() {}
+InputData::~InputData() = default;
 
 InputData::InputData(InputType aInputType)
     : mInputType(aInputType),

widget/MouseEvents.h

@@ -28,7 +28,7 @@ class WidgetPointerEventHolder final {
   NS_INLINE_DECL_REFCOUNTING(WidgetPointerEventHolder)
 
  private:
-  virtual ~WidgetPointerEventHolder() {}
+  virtual ~WidgetPointerEventHolder() = default;
 };
 
 /******************************************************************************
@@ -62,14 +62,7 @@ class WidgetPointerHelper {
         tangentialPressure(aTangentialPressure),
         convertToPointer(true) {}
 
-  explicit WidgetPointerHelper(const WidgetPointerHelper& aHelper)
-      : pointerId(aHelper.pointerId),
-        tiltX(aHelper.tiltX),
-        tiltY(aHelper.tiltY),
-        twist(aHelper.twist),
-        tangentialPressure(aHelper.tangentialPressure),
-        convertToPointer(aHelper.convertToPointer),
-        mCoalescedWidgetEvents(aHelper.mCoalescedWidgetEvents) {}
+  explicit WidgetPointerHelper(const WidgetPointerHelper& aHelper) = default;
 
   void AssignPointerHelperData(const WidgetPointerHelper& aEvent,
                                bool aCopyCoalescedEvents = false) {

widget/PuppetBidiKeyboard.cpp

@@ -15,7 +15,7 @@ NS_IMPL_ISUPPORTS(PuppetBidiKeyboard, nsIBidiKeyboard)
 PuppetBidiKeyboard::PuppetBidiKeyboard()
     : nsIBidiKeyboard(), mIsLangRTL(false), mHaveBidiKeyboards(false) {}
 
-PuppetBidiKeyboard::~PuppetBidiKeyboard() {}
+PuppetBidiKeyboard::~PuppetBidiKeyboard() = default;
 
 NS_IMETHODIMP
 PuppetBidiKeyboard::Reset() { return NS_OK; }

widget/PuppetWidget.cpp

@@ -1185,7 +1185,7 @@ void PuppetWidget::StartAsyncScrollbarDrag(
 
 PuppetScreen::PuppetScreen(void* nativeScreen) {}
 
-PuppetScreen::~PuppetScreen() {}
+PuppetScreen::~PuppetScreen() = default;
 
 static ScreenConfiguration ScreenConfig() {
   ScreenConfiguration config;
@@ -1230,7 +1230,7 @@ PuppetScreenManager::PuppetScreenManager() {
   mOneScreen = new PuppetScreen(nullptr);
 }
 
-PuppetScreenManager::~PuppetScreenManager() {}
+PuppetScreenManager::~PuppetScreenManager() = default;
 
 NS_IMETHODIMP
 PuppetScreenManager::GetPrimaryScreen(nsIScreen** outScreen) {

widget/Screen.h

@@ -35,7 +35,7 @@ class Screen final : public nsIScreen {
   mozilla::dom::ScreenDetails ToScreenDetails();
 
  private:
-  virtual ~Screen() {}
+  virtual ~Screen() = default;
 
   LayoutDeviceIntRect mRect;
   LayoutDeviceIntRect mAvailRect;

widget/ScreenManager.cpp

@@ -23,9 +23,9 @@ namespace mozilla::widget {
 
 NS_IMPL_ISUPPORTS(ScreenManager, nsIScreenManager)
 
-ScreenManager::ScreenManager() {}
+ScreenManager::ScreenManager() = default;
 
-ScreenManager::~ScreenManager() {}
+ScreenManager::~ScreenManager() = default;
 
 static StaticRefPtr<ScreenManager> sSingleton;
 

widget/ScreenManager.h

@@ -28,7 +28,7 @@ class ScreenManager final : public nsIScreenManager {
  public:
   class Helper {
    public:
-    virtual ~Helper() {}
+    virtual ~Helper() = default;
   };
 
  public:

widget/TextEventDispatcher.h

@@ -32,7 +32,7 @@ class PuppetWidget;
  */
 
 class TextEventDispatcher final {
-  ~TextEventDispatcher() {}
+  ~TextEventDispatcher() = default;
 
   NS_INLINE_DECL_REFCOUNTING(TextEventDispatcher)
 

widget/TextRange.h

@@ -184,7 +184,7 @@ struct TextRange {
 class TextRangeArray final : public AutoTArray<TextRange, 10> {
   friend class WidgetCompositionEvent;
 
-  ~TextRangeArray() {}
+  ~TextRangeArray() = default;
 
   NS_INLINE_DECL_REFCOUNTING(TextRangeArray)
 

widget/VsyncDispatcher.h

@@ -27,8 +27,8 @@ class VsyncObserver {
   virtual bool NotifyVsync(const VsyncEvent& aVsync) = 0;
 
  protected:
-  VsyncObserver() {}
-  virtual ~VsyncObserver() {}
+  VsyncObserver() = default;
+  virtual ~VsyncObserver() = default;
 };  // VsyncObserver
 
 // Used to dispatch vsync events in the parent process to compositors.

widget/WindowSurface.h

@@ -16,7 +16,7 @@ namespace widget {
 // A class for drawing to double-buffered windows.
 class WindowSurface {
  public:
-  virtual ~WindowSurface() {}
+  virtual ~WindowSurface() = default;
 
   // Locks a region of the window for drawing, returning a draw target
   // capturing the bounds of the provided region.

widget/gtk/CompositorWidgetChild.cpp

@@ -19,7 +19,7 @@ CompositorWidgetChild::CompositorWidgetChild(
   MOZ_ASSERT(!gfxPlatform::IsHeadless());
 }
 
-CompositorWidgetChild::~CompositorWidgetChild() {}
+CompositorWidgetChild::~CompositorWidgetChild() = default;
 
 bool CompositorWidgetChild::Initialize() { return true; }
 

widget/gtk/CompositorWidgetParent.cpp

@@ -18,7 +18,7 @@ CompositorWidgetParent::CompositorWidgetParent(
   MOZ_ASSERT(XRE_GetProcessType() == GeckoProcessType_GPU);
 }
 
-CompositorWidgetParent::~CompositorWidgetParent() {}
+CompositorWidgetParent::~CompositorWidgetParent() = default;
 
 void CompositorWidgetParent::ObserveVsync(VsyncObserver* aObserver) {
   if (aObserver) {

widget/gtk/IMContextWrapper.cpp

@@ -131,7 +131,7 @@ class GetWritingModeName : public nsAutoCString {
     }
     AssignLiteral("Vertical (RTL)");
   }
-  virtual ~GetWritingModeName() {}
+  virtual ~GetWritingModeName() = default;
 };
 
 class GetTextRangeStyleText final : public nsAutoCString {
@@ -201,7 +201,7 @@ class GetTextRangeStyleText final : public nsAutoCString {
     AppendPrintf("{ R=0x%02X, G=0x%02X, B=0x%02X, A=0x%02X }", NS_GET_R(aColor),
                  NS_GET_G(aColor), NS_GET_B(aColor), NS_GET_A(aColor));
   }
-  virtual ~GetTextRangeStyleText(){};
+  virtual ~GetTextRangeStyleText() = default;
 };
 
 const static bool kUseSimpleContextDefault = false;

widget/gtk/WindowSurfaceWayland.cpp

@@ -444,7 +444,7 @@ WindowBackBufferDMABuf::WindowBackBufferDMABuf(
        (void*)this, aWidth, aHeight));
 }
 
-WindowBackBufferDMABuf::~WindowBackBufferDMABuf() {}
+WindowBackBufferDMABuf::~WindowBackBufferDMABuf() = default;
 
 already_AddRefed<gfx::DrawTarget> WindowBackBufferDMABuf::Lock() {
   LOGWAYLAND(

widget/gtk/WindowSurfaceWayland.h

@@ -81,7 +81,7 @@ class WindowBackBuffer {
 
   WindowBackBuffer(WindowSurfaceWayland* aWindowSurfaceWayland)
       : mWindowSurfaceWayland(aWindowSurfaceWayland){};
-  virtual ~WindowBackBuffer(){};
+  virtual ~WindowBackBuffer() = default;
 
  protected:
   WindowSurfaceWayland* mWindowSurfaceWayland;

widget/gtk/nsApplicationChooser.cpp

@@ -20,9 +20,9 @@ using namespace mozilla;
 
 NS_IMPL_ISUPPORTS(nsApplicationChooser, nsIApplicationChooser)
 
-nsApplicationChooser::nsApplicationChooser() {}
+nsApplicationChooser::nsApplicationChooser() = default;
 
-nsApplicationChooser::~nsApplicationChooser() {}
+nsApplicationChooser::~nsApplicationChooser() = default;
 
 NS_IMETHODIMP
 nsApplicationChooser::Init(mozIDOMWindowProxy* aParent,

widget/gtk/nsBidiKeyboard.cpp

@@ -29,7 +29,7 @@ nsBidiKeyboard::Reset() {
   return NS_OK;
 }
 
-nsBidiKeyboard::~nsBidiKeyboard() {}
+nsBidiKeyboard::~nsBidiKeyboard() = default;
 
 NS_IMETHODIMP
 nsBidiKeyboard::IsLangRTL(bool* aIsRTL) {

widget/gtk/nsClipboard.cpp

@@ -74,7 +74,7 @@ int GetGeckoClipboardType(GtkClipboard* aGtkClipboard) {
     return -1;  // THAT AIN'T NO CLIPBOARD I EVER HEARD OF
 }
 
-nsClipboard::nsClipboard() {}
+nsClipboard::nsClipboard() = default;
 
 nsClipboard::~nsClipboard() {
   // We have to clear clipboard before gdk_display_close() call.

widget/gtk/nsClipboard.h

@@ -38,7 +38,7 @@ class nsRetrievalContext {
 
   virtual bool HasSelectionSupport(void) = 0;
 
-  virtual ~nsRetrievalContext(){};
+  virtual ~nsRetrievalContext() = default;
 };
 
 class nsClipboard : public nsIClipboard, public nsIObserver {

widget/gtk/nsClipboardWayland.h

@@ -29,7 +29,7 @@ class DataOffer {
   char* GetData(wl_display* aDisplay, const char* aMimeType,
                 uint32_t* aContentLength);
 
-  virtual ~DataOffer(){};
+  virtual ~DataOffer() = default;
 
  private:
   virtual bool RequestDataTransfer(const char* aMimeType, int fd) = 0;
@@ -98,7 +98,7 @@ class nsWaylandDragContext : public nsISupports {
   char* GetData(const char* aMimeType, uint32_t* aContentLength);
 
  private:
-  virtual ~nsWaylandDragContext(){};
+  virtual ~nsWaylandDragContext() = default;
 
   nsAutoPtr<WaylandDataOffer> mDataOffer;
   wl_display* mDisplay;

widget/gtk/nsColorPicker.h

@@ -24,10 +24,10 @@ class nsColorPicker final : public nsIColorPicker {
   NS_DECL_ISUPPORTS
   NS_DECL_NSICOLORPICKER
 
-  nsColorPicker(){};
+  nsColorPicker() = default;
 
  private:
-  ~nsColorPicker(){};
+  ~nsColorPicker() = default;
 
   static nsString ToHexString(int n);
 

widget/gtk/nsDeviceContextSpecG.cpp

@@ -71,7 +71,7 @@ class GlobalPrinters {
   void GetDefaultPrinterName(nsAString& aDefaultPrinterName);
 
  protected:
-  GlobalPrinters() {}
+  GlobalPrinters() = default;
 
   static GlobalPrinters mGlobalPrinters;
   static nsTArray<nsString>* mGlobalPrinterList;
@@ -370,7 +370,7 @@ NS_IMETHODIMP nsDeviceContextSpecGTK::EndDocument() {
 }
 
 //  Printer Enumerator
-nsPrinterEnumeratorGTK::nsPrinterEnumeratorGTK() {}
+nsPrinterEnumeratorGTK::nsPrinterEnumeratorGTK() = default;
 
 NS_IMPL_ISUPPORTS(nsPrinterEnumeratorGTK, nsIPrinterEnumerator)
 

widget/gtk/nsDeviceContextSpecG.h

@@ -62,7 +62,7 @@ class nsDeviceContextSpecGTK : public nsIDeviceContextSpec {
 // Printer Enumerator
 //-------------------------------------------------------------------------
 class nsPrinterEnumeratorGTK final : public nsIPrinterEnumerator {
-  ~nsPrinterEnumeratorGTK() {}
+  ~nsPrinterEnumeratorGTK() = default;
 
  public:
   nsPrinterEnumeratorGTK();

widget/gtk/nsFilePicker.cpp

@@ -166,7 +166,7 @@ nsFilePicker::nsFilePicker()
   giovfs->ShouldUseFlatpakPortal(&mUseNativeFileChooser);
 }
 
-nsFilePicker::~nsFilePicker() {}
+nsFilePicker::~nsFilePicker() = default;
 
 void ReadMultipleFiles(gpointer filename, gpointer array) {
   nsCOMPtr<nsIFile> localfile;

widget/gtk/nsImageToPixbuf.h

@@ -33,7 +33,7 @@ class nsImageToPixbuf final : public nsIImageToPixbuf {
                                           int32_t aWidth, int32_t aHeight);
 
  private:
-  ~nsImageToPixbuf() {}
+  ~nsImageToPixbuf() = default;
 };
 
 // fc2389b8-c650-4093-9e42-b05e5f0685b7

widget/gtk/nsLookAndFeel.cpp

@@ -63,7 +63,7 @@ extern mozilla::LazyLogModule gWidgetLog;
 
 nsLookAndFeel::nsLookAndFeel() = default;
 
-nsLookAndFeel::~nsLookAndFeel() {}
+nsLookAndFeel::~nsLookAndFeel() = default;
 
 // Modifies color |*aDest| as if a pattern of color |aSource| was painted with
 // CAIRO_OPERATOR_OVER to a surface with color |*aDest|.

widget/gtk/nsNativeThemeGTK.cpp

@@ -112,7 +112,7 @@ nsNativeThemeGTK::nsNativeThemeGTK() {
   ThemeChanged();
 }
 
-nsNativeThemeGTK::~nsNativeThemeGTK() {}
+nsNativeThemeGTK::~nsNativeThemeGTK() = default;
 
 NS_IMETHODIMP
 nsNativeThemeGTK::Observe(nsISupports* aSubject, const char* aTopic,

widget/gtk/nsPrintDialogGTK.cpp

@@ -485,9 +485,9 @@ GtkWidget* nsPrintDialogWidgetGTK::ConstructHeaderFooterDropdown(
 
 NS_IMPL_ISUPPORTS(nsPrintDialogServiceGTK, nsIPrintDialogService)
 
-nsPrintDialogServiceGTK::nsPrintDialogServiceGTK() {}
+nsPrintDialogServiceGTK::nsPrintDialogServiceGTK() = default;
 
-nsPrintDialogServiceGTK::~nsPrintDialogServiceGTK() {}
+nsPrintDialogServiceGTK::~nsPrintDialogServiceGTK() = default;
 
 NS_IMETHODIMP
 nsPrintDialogServiceGTK::Init() { return NS_OK; }

widget/gtk/nsPrintSettingsServiceGTK.h

@@ -17,7 +17,7 @@ class PrintData;
 
 class nsPrintSettingsServiceGTK final : public nsPrintSettingsService {
  public:
-  nsPrintSettingsServiceGTK() {}
+  nsPrintSettingsServiceGTK() = default;
 
   NS_IMETHODIMP SerializeToPrintData(
       nsIPrintSettings* aSettings,

widget/gtk/nsSound.cpp

@@ -144,7 +144,7 @@ NS_IMPL_ISUPPORTS(nsSound, nsISound, nsIStreamLoaderObserver)
 ////////////////////////////////////////////////////////////////////////
 nsSound::nsSound() { mInited = false; }
 
-nsSound::~nsSound() {}
+nsSound::~nsSound() = default;
 
 NS_IMETHODIMP
 nsSound::Init() {

widget/headless/HeadlessClipboard.h

@@ -21,7 +21,7 @@ class HeadlessClipboard final : public nsIClipboard {
   HeadlessClipboard();
 
  protected:
-  ~HeadlessClipboard() {}
+  ~HeadlessClipboard() = default;
 
  private:
   UniquePtr<HeadlessClipboardData> mClipboard;

widget/headless/HeadlessLookAndFeelGTK.cpp

@@ -15,9 +15,9 @@ namespace widget {
 
 static const char16_t UNICODE_BULLET = 0x2022;
 
-HeadlessLookAndFeel::HeadlessLookAndFeel() {}
+HeadlessLookAndFeel::HeadlessLookAndFeel() = default;
 
-HeadlessLookAndFeel::~HeadlessLookAndFeel() {}
+HeadlessLookAndFeel::~HeadlessLookAndFeel() = default;
 
 nsresult HeadlessLookAndFeel::NativeGetColor(ColorID aID, nscolor& aColor) {
   // For headless mode, we use GetStandinForNativeColor for everything we can,

widget/headless/HeadlessScreenHelper.h

@@ -15,7 +15,7 @@ namespace widget {
 class HeadlessScreenHelper final : public ScreenManager::Helper {
  public:
   HeadlessScreenHelper();
-  ~HeadlessScreenHelper() override{};
+  ~HeadlessScreenHelper() override = default;
 
  private:
   static LayoutDeviceIntRect GetScreenRect();

widget/headless/HeadlessSound.cpp

@@ -11,9 +11,9 @@ namespace widget {
 
 NS_IMPL_ISUPPORTS(HeadlessSound, nsISound, nsIStreamLoaderObserver)
 
-HeadlessSound::HeadlessSound() {}
+HeadlessSound::HeadlessSound() = default;
 
-HeadlessSound::~HeadlessSound() {}
+HeadlessSound::~HeadlessSound() = default;
 
 NS_IMETHODIMP
 HeadlessSound::Init() { return NS_OK; }

widget/headless/HeadlessThemeGTK.h

@@ -52,7 +52,7 @@ class HeadlessThemeGTK final : private nsNativeTheme, public nsITheme {
   virtual bool ThemeNeedsComboboxDropmarker() override;
 
  protected:
-  virtual ~HeadlessThemeGTK() {}
+  virtual ~HeadlessThemeGTK() = default;
 };
 
 }  // namespace widget

widget/nsBaseAppShell.cpp

@@ -35,7 +35,7 @@ nsBaseAppShell::nsBaseAppShell()
       mBlockNativeEvent(false),
       mProcessedGeckoEvents(false) {}
 
-nsBaseAppShell::~nsBaseAppShell() {}
+nsBaseAppShell::~nsBaseAppShell() = default;
 
 nsresult nsBaseAppShell::Init() {
   // Configure ourselves as an observer for the current thread:

widget/nsBaseFilePicker.cpp

@@ -144,7 +144,7 @@ class nsBaseFilePickerEnumerator : public nsSimpleEnumerator {
 nsBaseFilePicker::nsBaseFilePicker()
     : mAddToRecentDocs(true), mMode(nsIFilePicker::modeOpen) {}
 
-nsBaseFilePicker::~nsBaseFilePicker() {}
+nsBaseFilePicker::~nsBaseFilePicker() = default;
 
 NS_IMETHODIMP nsBaseFilePicker::Init(mozIDOMWindowProxy* aParent,
                                      const nsAString& aTitle, int16_t aMode) {

widget/nsBaseScreen.cpp

@@ -11,9 +11,9 @@
 
 NS_IMPL_ISUPPORTS(nsBaseScreen, nsIScreen)
 
-nsBaseScreen::nsBaseScreen() {}
+nsBaseScreen::nsBaseScreen() = default;
 
-nsBaseScreen::~nsBaseScreen() {}
+nsBaseScreen::~nsBaseScreen() = default;
 
 NS_IMETHODIMP
 nsBaseScreen::GetRectDisplayPix(int32_t* outLeft, int32_t* outTop,

widget/nsBaseWidget.cpp

@@ -3159,7 +3159,7 @@ static void debug_SetCachedBoolPref(const char* aPrefName, bool aValue) {
 
 //////////////////////////////////////////////////////////////
 class Debug_PrefObserver final : public nsIObserver {
-  ~Debug_PrefObserver() {}
+  ~Debug_PrefObserver() = default;
 
  public:
   NS_DECL_ISUPPORTS

widget/nsClipboardHelper.cpp

@@ -23,7 +23,7 @@ NS_IMPL_ISUPPORTS(nsClipboardHelper, nsIClipboardHelper)
  * nsClipboardHelper ctor / dtor
  *****************************************************************************/
 
-nsClipboardHelper::nsClipboardHelper() {}
+nsClipboardHelper::nsClipboardHelper() = default;
 
 nsClipboardHelper::~nsClipboardHelper() {
   // no members, nothing to destroy

widget/nsClipboardProxy.h

@@ -40,7 +40,7 @@ class nsClipboardProxy final : public nsIClipboardProxy {
       const ClipboardCapabilities& aClipboardCaps) override;
 
  private:
-  ~nsClipboardProxy() {}
+  ~nsClipboardProxy() = default;
 
   ClipboardCapabilities mClipboardCaps;
 };

widget/nsColorPickerProxy.h

@@ -16,14 +16,14 @@ class nsColorPickerProxy final : public nsIColorPicker,
   NS_DECL_ISUPPORTS
   NS_DECL_NSICOLORPICKER
 
-  nsColorPickerProxy() {}
+  nsColorPickerProxy() = default;
 
   virtual mozilla::ipc::IPCResult RecvUpdate(const nsString& aColor) override;
   virtual mozilla::ipc::IPCResult Recv__delete__(
       const nsString& aColor) override;
 
  private:
-  ~nsColorPickerProxy() {}
+  ~nsColorPickerProxy() = default;
 
   nsCOMPtr<nsIColorPickerShownCallback> mCallback;
   nsString mTitle;

widget/nsDeviceContextSpecProxy.h

@@ -53,7 +53,7 @@ class nsDeviceContextSpecProxy final : public nsIDeviceContextSpec {
   NS_IMETHOD EndPage() final;
 
  private:
-  ~nsDeviceContextSpecProxy() {}
+  ~nsDeviceContextSpecProxy() = default;
 
   nsCOMPtr<nsIPrintSettings> mPrintSettings;
   nsCOMPtr<nsIPrintSession> mPrintSession;

widget/nsDragServiceProxy.cpp

@@ -21,9 +21,9 @@ using mozilla::gfx::SourceSurface;
 using mozilla::gfx::SurfaceFormat;
 using mozilla::ipc::Shmem;
 
-nsDragServiceProxy::nsDragServiceProxy() {}
+nsDragServiceProxy::nsDragServiceProxy() = default;
 
-nsDragServiceProxy::~nsDragServiceProxy() {}
+nsDragServiceProxy::~nsDragServiceProxy() = default;
 
 nsresult nsDragServiceProxy::InvokeDragSessionImpl(
     nsIArray* aArrayTransferables, const Maybe<CSSIntRegion>& aRegion,

widget/nsFilePickerProxy.cpp

@@ -20,7 +20,7 @@ NS_IMPL_ISUPPORTS(nsFilePickerProxy, nsIFilePicker)
 nsFilePickerProxy::nsFilePickerProxy()
     : mSelectedType(0), mCapture(captureNone), mIPCActive(false) {}
 
-nsFilePickerProxy::~nsFilePickerProxy() {}
+nsFilePickerProxy::~nsFilePickerProxy() = default;
 
 NS_IMETHODIMP
 nsFilePickerProxy::Init(mozIDOMWindowProxy* aParent, const nsAString& aTitle,

widget/nsHTMLFormatConverter.cpp

@@ -16,9 +16,9 @@
 #include "nsIDocumentEncoder.h"
 #include "nsContentUtils.h"
 
-nsHTMLFormatConverter::nsHTMLFormatConverter() {}
+nsHTMLFormatConverter::nsHTMLFormatConverter() = default;
 
-nsHTMLFormatConverter::~nsHTMLFormatConverter() {}
+nsHTMLFormatConverter::~nsHTMLFormatConverter() = default;
 
 NS_IMPL_ISUPPORTS(nsHTMLFormatConverter, nsIFormatConverter)
 

widget/nsIdleService.h

@@ -30,7 +30,7 @@ class IdleListener {
 
   IdleListener(nsIObserver* obs, uint32_t reqIT, bool aIsIdle = false)
       : observer(obs), reqIdleTime(reqIT), isIdle(aIsIdle) {}
-  ~IdleListener() {}
+  ~IdleListener() = default;
 };
 
 // This one will be declared later.

widget/nsNativeTheme.h

@@ -32,7 +32,7 @@ class EventStates;
 
 class nsNativeTheme : public nsITimerCallback, public nsINamed {
  protected:
-  virtual ~nsNativeTheme() {}
+  virtual ~nsNativeTheme() = default;
 
   NS_DECL_ISUPPORTS
   NS_DECL_NSITIMERCALLBACK

widget/nsPrintSession.cpp

@@ -16,10 +16,10 @@ typedef mozilla::layout::RemotePrintJobChild RemotePrintJobChild;
 NS_IMPL_ISUPPORTS(nsPrintSession, nsIPrintSession, nsISupportsWeakReference)
 
 //-----------------------------------------------------------------------------
-nsPrintSession::nsPrintSession() {}
+nsPrintSession::nsPrintSession() = default;
 
 //-----------------------------------------------------------------------------
-nsPrintSession::~nsPrintSession() {}
+nsPrintSession::~nsPrintSession() = default;
 
 //-----------------------------------------------------------------------------
 nsresult nsPrintSession::Init() { return NS_OK; }

widget/nsPrintSettingsImpl.cpp

@@ -58,7 +58,7 @@ nsPrintSettings::nsPrintSettings()
 
 nsPrintSettings::nsPrintSettings(const nsPrintSettings& aPS) { *this = aPS; }
 
-nsPrintSettings::~nsPrintSettings() {}
+nsPrintSettings::~nsPrintSettings() = default;
 
 NS_IMETHODIMP nsPrintSettings::GetPrintSession(
     nsIPrintSession** aPrintSession) {

widget/nsPrintSettingsService.h

@@ -23,7 +23,7 @@ class nsPrintSettingsService : public nsIPrintSettingsService {
   NS_DECL_ISUPPORTS
   NS_DECL_NSIPRINTSETTINGSSERVICE
 
-  nsPrintSettingsService() {}
+  nsPrintSettingsService() = default;
 
   /**
    * method Init
@@ -39,7 +39,7 @@ class nsPrintSettingsService : public nsIPrintSettingsService {
   nsPrintSettingsService& operator=(const nsPrintSettingsService& x) = delete;
 
  protected:
-  virtual ~nsPrintSettingsService() {}
+  virtual ~nsPrintSettingsService() = default;
 
   void ReadBitFieldPref(const char* aPrefId, int32_t anOption);
   void WriteBitFieldPref(const char* aPrefId, int32_t anOption);

widget/nsTransferable.cpp

@@ -187,7 +187,7 @@ nsTransferable::nsTransferable()
 // Transferable destructor
 //
 //-------------------------------------------------------------------------
-nsTransferable::~nsTransferable() {}
+nsTransferable::~nsTransferable() = default;
 
 NS_IMETHODIMP
 nsTransferable::Init(nsILoadContext* aContext) {