Bug 1870512 - Remove top-level windows with WindowType::Popup. r=tnikkel,sessionstore-reviewers,dao

These are only used right now for XUL notifications. They are extremely
weird (I bet there's tons of code that assume that WindowType::Popup
corresponds to nsMenuPopupFrame), and afaict there's no good reason why
these have to be this way.

They no longer are on Linux (because Wayland doesn't support such
thing for example).

XUL alerts work fine with this patch on all platforms after some basic
testing.

The other usage of this for the gfx sanity test can use type=dialog.
Actually it can just be a toplevel, but that breaks the XUL skeleton UI.

Differential Revision: https://phabricator.services.mozilla.com/D196665

browser/components/sessionstore/SessionStore.sys.mjs

@@ -80,19 +80,6 @@ const CHROME_FLAGS_MAP = [
   // Do not inherit remoteness and fissionness from the previous session.
   //[Ci.nsIWebBrowserChrome.CHROME_REMOTE_WINDOW, "remote", "non-remote"],
   //[Ci.nsIWebBrowserChrome.CHROME_FISSION_WINDOW, "fission", "non-fission"],
-  [Ci.nsIWebBrowserChrome.CHROME_WINDOW_POPUP, "popup"],
-  [
-    Ci.nsIWebBrowserChrome.CHROME_WINDOW_POPUP |
-      Ci.nsIWebBrowserChrome.CHROME_TITLEBAR,
-    "",
-    "titlebar=0",
-  ],
-  [
-    Ci.nsIWebBrowserChrome.CHROME_WINDOW_POPUP |
-      Ci.nsIWebBrowserChrome.CHROME_WINDOW_CLOSE,
-    "",
-    "close=0",
-  ],
   [Ci.nsIWebBrowserChrome.CHROME_WINDOW_LOWERED, "alwayslowered"],
   [Ci.nsIWebBrowserChrome.CHROME_WINDOW_RAISED, "alwaysraised"],
   // "chrome" and "suppressanimation" are always set.

toolkit/components/alerts/nsXULAlerts.cpp

@@ -354,7 +354,7 @@ nsXULAlerts::ShowAlertWithIconURI(nsIAlertNotification* aAlert,
   NS_ENSURE_SUCCESS(rv, rv);
 
   nsCOMPtr<mozIDOMWindowProxy> newWindow;
-  nsAutoCString features("chrome,dialog=yes,titlebar=no,popup=yes");
+  nsAutoCString features("chrome,dialog=yes,titlebar=no");
   if (inPrivateBrowsing) {
     features.AppendLiteral(",private");
   }

toolkit/components/browser/nsIWebBrowserChrome.idl

@@ -47,7 +47,6 @@ interface nsIWebBrowserChrome : nsISupports
 
     // special cases
     const unsigned long CHROME_WINDOW_MIN             = 0x00004000;
-    const unsigned long CHROME_WINDOW_POPUP           = 0x00008000;
 
     // whether to open a new private window.  CHROME_NON_PRIVATE_WINDOW
     // forces the opened window to be non-private, and overrides

toolkit/components/gfx/SanityTest.sys.mjs

@@ -425,7 +425,7 @@ SanityTest.prototype = {
         PAGE_WIDTH +
         ",height=" +
         PAGE_HEIGHT +
-        ",chrome,titlebar=0,scrollbars=0,popup=1",
+        ",chrome,titlebar=0,scrollbars=0,dialog=1",
       null
     );
 

toolkit/components/windowwatcher/nsWindowWatcher.cpp

@@ -1963,10 +1963,6 @@ uint32_t nsWindowWatcher::CalculateChromeFlagsForSystem(
     chromeFlags |= nsIWebBrowserChrome::CHROME_FISSION_WINDOW;
   }
 
-  if (aFeatures.GetBoolWithDefault("popup", false, &presenceFlag)) {
-    chromeFlags |= nsIWebBrowserChrome::CHROME_WINDOW_POPUP;
-  }
-
   /* OK.
      Normal browser windows, in spite of a stated pattern of turning off
      all chrome not mentioned explicitly, will want the new OS chrome (window
@@ -1975,14 +1971,12 @@ uint32_t nsWindowWatcher::CalculateChromeFlagsForSystem(
      to mean "OS' choice." */
 
   // default titlebar and closebox to "on," if not mentioned at all
-  if (!(chromeFlags & nsIWebBrowserChrome::CHROME_WINDOW_POPUP)) {
   if (!aFeatures.Exists("titlebar")) {
     chromeFlags |= nsIWebBrowserChrome::CHROME_TITLEBAR;
   }
   if (!aFeatures.Exists("close")) {
     chromeFlags |= nsIWebBrowserChrome::CHROME_WINDOW_CLOSE;
   }
-  }
 
   if (aDialog && !aFeatures.IsEmpty() && !presenceFlag) {
     chromeFlags = nsIWebBrowserChrome::CHROME_DEFAULT;

toolkit/components/windowwatcher/test/browser_new_content_window_chromeflags.js

@@ -37,10 +37,6 @@ const DISALLOWED = {
   // "remote":
   //   checked manually, since its default value will
   //   depend on whether or not e10s is enabled by default.
-  popup: {
-    flag: Ci.nsIWebBrowserChrome.CHROME_WINDOW_POPUP,
-    defaults_to: false,
-  },
   alwaysLowered: {
     flag: Ci.nsIWebBrowserChrome.CHROME_WINDOW_LOWERED,
     defaults_to: false,

xpfe/appshell/nsAppShellService.cpp

@@ -567,9 +567,6 @@ nsresult nsAppShellService::JustCreateTopWindow(
             ? widget::WindowType::Dialog
             : widget::WindowType::TopLevel;
 
-  if (aChromeMask & nsIWebBrowserChrome::CHROME_WINDOW_POPUP)
-    widgetInitData.mWindowType = widget::WindowType::Popup;
-
   if (aChromeMask & nsIWebBrowserChrome::CHROME_SUPPRESS_ANIMATION)
     widgetInitData.mIsAnimationSuppressed = true;