Bug 1462964: Remove obsolete nsIDOMBlob interface. r=bz

MozReview-Commit-ID: 2HIlaSrvfBe

--HG--
extra : rebase_source : 944a6244dbfe1f0a37dd34a041d1329624a86f93
extra : histedit_source : d7859be664fed00f8504e40969480d3af3d674e7%2C4456b502db338bd06823654306e47c2583101396

dom/events/DataTransferItem.cpp

@@ -109,7 +109,7 @@ DataTransferItem::KindFromData(nsIVariant* aData)
   nsresult rv = aData->GetAsISupports(getter_AddRefs(supports));
   if (NS_SUCCEEDED(rv) && supports) {
     // Check if we have one of the supported file data formats
-    if (nsCOMPtr<nsIDOMBlob>(do_QueryInterface(supports)) ||
+    if (RefPtr<Blob>(do_QueryObject(supports)) ||
         nsCOMPtr<BlobImpl>(do_QueryInterface(supports)) ||
         nsCOMPtr<nsIFile>(do_QueryInterface(supports))) {
       return KIND_FILE;
@@ -292,8 +292,7 @@ DataTransferItem::GetAsFile(nsIPrincipal& aSubjectPrincipal,
       return nullptr;
     }
 
-    if (nsCOMPtr<nsIDOMBlob> domBlob = do_QueryInterface(supports)) {
-      Blob* blob = static_cast<Blob*>(domBlob.get());
+    if (RefPtr<Blob> blob = do_QueryObject(supports)) {
       mCachedFile = blob->ToFile();
     } else if (nsCOMPtr<BlobImpl> blobImpl = do_QueryInterface(supports)) {
       MOZ_ASSERT(blobImpl->IsFile());

dom/file/Blob.cpp

@@ -34,8 +34,12 @@ NS_IMPL_CYCLE_COLLECTION_TRACE_END
 
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Blob)
   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
-  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIDOMBlob)
-  NS_INTERFACE_MAP_ENTRY(nsIDOMBlob)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIMutable)
+  // Alas, there is no helper macro for this.
+  if (aIID.Equals(NS_GET_IID(Blob))) {
+    *aInstancePtr = do_AddRef(this).take();
+    return NS_OK;
+  } else
   NS_INTERFACE_MAP_ENTRY(nsIMutable)
   NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
 NS_INTERFACE_MAP_END

dom/file/Blob.h

@@ -13,7 +13,6 @@
 #include "mozilla/dom/BlobImpl.h"
 #include "nsCycleCollectionParticipant.h"
 #include "nsCOMPtr.h"
-#include "nsIDOMBlob.h"
 #include "nsIMutable.h"
 #include "nsWrapperCache.h"
 #include "nsWeakReference.h"
@@ -27,17 +26,21 @@ struct BlobPropertyBag;
 class File;
 class OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString;
 
-class Blob : public nsIDOMBlob
-           , public nsIMutable
+#define NS_DOM_BLOB_IID \
+{ 0x648c2a83, 0xbdb1, 0x4a7d, \
+  { 0xb5, 0x0a, 0xca, 0xcd, 0x92, 0x87, 0x45, 0xc2 } }
+
+
+class Blob : public nsIMutable
            , public nsSupportsWeakReference
            , public nsWrapperCache
 {
 public:
-  NS_DECL_NSIDOMBLOB
   NS_DECL_NSIMUTABLE
 
   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
-  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(Blob, nsIDOMBlob)
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(Blob, nsIMutable)
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_DOM_BLOB_IID)
 
   typedef OwningArrayBufferViewOrArrayBufferOrBlobOrUSVString BlobPart;
 
@@ -147,6 +150,8 @@ private:
   nsCOMPtr<nsISupports> mParent;
 };
 
+NS_DEFINE_STATIC_IID_ACCESSOR(Blob, NS_DOM_BLOB_IID)
+
 // Override BindingJSObjectMallocBytes for blobs to tell the JS GC how much
 // memory is held live by the binding object.
 size_t BindingJSObjectMallocBytes(Blob* aBlob);
@@ -154,4 +159,10 @@ size_t BindingJSObjectMallocBytes(Blob* aBlob);
 } // namespace dom
 } // namespace mozilla
 
+inline nsISupports*
+ToSupports(mozilla::dom::Blob* aBlob)
+{
+  return static_cast<nsIMutable*>(aBlob);
+}
+
 #endif // mozilla_dom_Blob_h

dom/file/moz.build

@@ -9,12 +9,6 @@ with Files("**"):
 
 DIRS += ['ipc']
 
-XPIDL_SOURCES += [
-    'nsIDOMBlob.idl',
-]
-
-XPIDL_MODULE = 'dom_file'
-
 EXPORTS += [
     'nsHostObjectProtocolHandler.h',
     'nsHostObjectURI.h',

dom/file/nsIDOMBlob.idl

@@ -1,12 +0,0 @@
-/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "nsISupports.idl"
-
-[scriptable, builtinclass, uuid(f344146a-ee1f-417e-8a68-6984ca56f0ae)]
-interface nsIDOMBlob : nsISupports
-{
-  // Just an empty interface.
-};

dom/file/tests/test_ipc_messagemanager_blob.html

@@ -19,8 +19,10 @@
     function childFrameScript() {
       "use strict";
 
+      Cu.importGlobalProperties(["Blob"]);
+
       addMessageListener("test:ipcClonedMessage", function(message) {
-        if (!(message.json instanceof Ci.nsIDOMBlob)) {
+        if (!Blob.isInstance(message.json)) {
           sendAsyncMessage(message.name, message.json);
           return;
         }

dom/html/HTMLInputElement.cpp

@@ -18,6 +18,7 @@
 #include "mozilla/dom/WheelEventBinding.h"
 #include "nsAttrValueInlines.h"
 #include "nsCRTGlue.h"
+#include "nsQueryObject.h"
 
 #include "nsITextControlElement.h"
 #include "nsIDOMNSEditableElement.h"
@@ -508,7 +509,7 @@ HTMLInputElement::nsFilePickerShownCallback::Done(int16_t aResult)
 
     while (NS_SUCCEEDED(iter->HasMoreElements(&hasMore)) && hasMore) {
       iter->GetNext(getter_AddRefs(tmp));
-      nsCOMPtr<nsIDOMBlob> domBlob = do_QueryInterface(tmp);
+      RefPtr<Blob> domBlob = do_QueryObject(tmp);
       MOZ_ASSERT(domBlob,
                  "Null file object from FilePicker's file enumerator?");
       if (!domBlob) {
@@ -516,7 +517,7 @@ HTMLInputElement::nsFilePickerShownCallback::Done(int16_t aResult)
       }
 
       OwningFileOrDirectory* element = newFilesOrDirectories.AppendElement();
-      element->SetAsFile() = static_cast<File*>(domBlob.get());
+      element->SetAsFile() = domBlob->ToFile();
     }
   } else {
     MOZ_ASSERT(mode == static_cast<int16_t>(nsIFilePicker::modeOpen) ||
@@ -525,9 +526,9 @@ HTMLInputElement::nsFilePickerShownCallback::Done(int16_t aResult)
     nsresult rv = mFilePicker->GetDomFileOrDirectory(getter_AddRefs(tmp));
     NS_ENSURE_SUCCESS(rv, rv);
 
-    nsCOMPtr<nsIDOMBlob> blob = do_QueryInterface(tmp);
+    RefPtr<Blob> blob = do_QueryObject(tmp);
     if (blob) {
-      RefPtr<File> file = static_cast<Blob*>(blob.get())->ToFile();
+      RefPtr<File> file = blob->ToFile();
       MOZ_ASSERT(file);
 
       OwningFileOrDirectory* element = newFilesOrDirectories.AppendElement();

dom/indexedDB/IDBDatabase.cpp

@@ -915,8 +915,7 @@ IDBDatabase::GetOrCreateFileActorForBlob(Blob* aBlob)
   // a) it is unique per blob, b) it is reference-counted so that we can
   // guarantee that it stays alive, and c) it doesn't hold the actual File
   // alive.
-  nsCOMPtr<nsIDOMBlob> blob = aBlob;
-  nsCOMPtr<nsIWeakReference> weakRef = do_GetWeakReference(blob);
+  nsCOMPtr<nsIWeakReference> weakRef = do_GetWeakReference(aBlob);
   MOZ_ASSERT(weakRef);
 
   PBackgroundIDBDatabaseFileChild* actor = nullptr;

dom/indexedDB/test/file.js

@@ -110,8 +110,8 @@ function verifyBuffers(buffer1, buffer2)
 function verifyBlob(blob1, blob2, fileId, blobReadHandler)
 {
   // eslint-disable-next-line mozilla/use-cc-etc
-  is(blob1 instanceof Components.interfaces.nsIDOMBlob, true,
-     "Instance of nsIDOMBlob");
+  is(SpecialPowers.wrap(Blob).isInstance(blob1), true,
+     "Instance of Blob");
   is(blob1 instanceof File, blob2 instanceof File,
      "Instance of DOM File");
   is(blob1.size, blob2.size, "Correct size");

dom/indexedDB/test/test_message_manager_ipc.html

@@ -25,7 +25,7 @@ function childFrameScript() {
   const blobText = blobData.join("");
   const blobType = "text/plain";
 
-  Cu.importGlobalProperties(["indexedDB"]);
+  Cu.importGlobalProperties(["indexedDB", "Blob"]);
 
   function info(msg) {
     sendAsyncMessage(mmName, { op: "info", msg });
@@ -66,7 +66,7 @@ function childFrameScript() {
 
     let blob = message.data;
 
-    ok(blob instanceof Ci.nsIDOMBlob, "Message manager sent a blob");
+    ok(Blob.isInstance(blob), "Message manager sent a blob");
     is(blob.size, blobText.length, "Blob has correct length");
     is(blob.type, blobType, "Blob has correct type");
 
@@ -82,7 +82,7 @@ function childFrameScript() {
 
     let slice = blob.slice(0, blobData[0].length, blobType);
 
-    ok(slice instanceof Ci.nsIDOMBlob, "Slice returned a blob");
+    ok(Blob.isInstance(slice), "Slice returned a blob");
     is(slice.size, blobData[0].length, "Slice has correct length");
     is(slice.type, blobType, "Slice has correct type");
 
@@ -143,7 +143,7 @@ function childFrameScript() {
 
     blob = event.target.result;
 
-    ok(blob instanceof Ci.nsIDOMBlob, "Database gave us a blob");
+    ok(Blob.isInstance(blob), "Database gave us a blob");
     is(blob.size, blobText.length, "Blob has correct length");
     is(blob.type, blobType, "Blob has correct type");
 
@@ -178,7 +178,7 @@ function childFrameScript() {
 
     slice = event.target.result;
 
-    ok(slice instanceof Ci.nsIDOMBlob, "Database gave us a blob");
+    ok(Blob.isInstance(slice), "Database gave us a blob");
     is(slice.size, blobData[0].length, "Slice has correct length");
     is(slice.type, blobType, "Slice has correct type");
 

dom/indexedDB/test/unit/xpcshell-head-parent-process.js

@@ -10,6 +10,8 @@ var { "classes": Cc, "interfaces": Ci, "utils": Cu } = Components;
 
 ChromeUtils.import("resource://gre/modules/Services.jsm");
 
+Cu.importGlobalProperties(["Blob"]);
+
 if (!("self" in this)) {
   this.self = this;
 }
@@ -426,7 +428,7 @@ function verifyBuffers(buffer1, buffer2)
 
 function verifyBlob(blob1, blob2)
 {
-  is(blob1 instanceof Ci.nsIDOMBlob, true,
+  is(Blob.isInstance(blob1), true,
      "Instance of nsIDOMBlob");
   is(blob1 instanceof File, blob2 instanceof File,
      "Instance of DOM File");

dom/interfaces/base/nsIDOMWindow.idl

@@ -6,7 +6,6 @@
 #include "domstubs.idl"
 
 interface nsIControllers;
-interface nsIDOMBlob;
 interface nsIDOMOfflineResourceList;
 interface nsIPrompt;
 interface nsIVariant;

dom/ipc/tests/test_blob_sliced_from_parent_process.html

@@ -52,7 +52,7 @@ function childFrameScript() {
 
     let blob = message.data;
 
-    ok(blob instanceof Ci.nsIDOMBlob, "Received a Blob");
+    ok(Blob.isInstance(blob), "Received a Blob");
     is(blob.size, blobText.length, "Blob has correct length");
     is(blob.type, blobType, "Blob has correct type");
 
@@ -71,7 +71,7 @@ function childFrameScript() {
 
     let slice = blob.slice(firstSliceStart, firstSliceEnd, blobType);
 
-    ok(slice instanceof Ci.nsIDOMBlob, "Slice returned a Blob");
+    ok(Blob.isInstance(slice), "Slice returned a Blob");
     is(slice.size, blobData[2].length, "Slice has correct length");
     is(slice.type, blobType, "Slice has correct type");
 
@@ -90,7 +90,7 @@ function childFrameScript() {
 
     slice = slice.slice(secondSliceStart, secondSliceEnd, blobType);
 
-    ok(slice instanceof Ci.nsIDOMBlob, "Second slice returned a Blob");
+    ok(Blob.isInstance(slice), "Second slice returned a Blob");
     is(slice.size, sliceText.length, "Second slice has correct length");
     is(slice.type, blobType, "Second slice has correct type");
 

dom/media/nsIDOMNavigatorUserMedia.idl

@@ -26,7 +26,7 @@ interface nsIGetUserMediaDevicesSuccessCallback : nsISupports
 interface nsIDOMGetUserMediaSuccessCallback : nsISupports
 {
   /*
-   * value must be a nsIDOMBlob if picture is true and a
+   * value must be a Blob if picture is true and a
    * DOMLocalMediaStream if either audio or video are true.
    */
   void onSuccess(in nsISupports value);

dom/presentation/PresentationService.cpp

@@ -808,7 +808,7 @@ PresentationService::SendSessionBinaryMsg(const nsAString& aSessionId,
 NS_IMETHODIMP
 PresentationService::SendSessionBlob(const nsAString& aSessionId,
                                      uint8_t aRole,
-                                     nsIDOMBlob* aBlob)
+                                     Blob* aBlob)
 {
   MOZ_ASSERT(NS_IsMainThread());
   MOZ_ASSERT(!aSessionId.IsEmpty());

dom/presentation/PresentationSessionInfo.cpp

@@ -291,7 +291,7 @@ PresentationSessionInfo::SendBinaryMsg(const nsACString& aData)
 }
 
 nsresult
-PresentationSessionInfo::SendBlob(nsIDOMBlob* aBlob)
+PresentationSessionInfo::SendBlob(Blob* aBlob)
 {
   if (NS_WARN_IF(!IsSessionReady())) {
     return NS_ERROR_DOM_INVALID_STATE_ERR;

dom/presentation/PresentationSessionInfo.h

@@ -102,7 +102,7 @@ public:
 
   nsresult SendBinaryMsg(const nsACString& aData);
 
-  nsresult SendBlob(nsIDOMBlob* aBlob);
+  nsresult SendBlob(Blob* aBlob);
 
   nsresult Close(nsresult aReason,
                  uint32_t aState);

dom/presentation/PresentationTCPSessionTransport.cpp

@@ -424,7 +424,7 @@ PresentationTCPSessionTransport::SendBinaryMsg(const nsACString& aData)
 }
 
 NS_IMETHODIMP
-PresentationTCPSessionTransport::SendBlob(nsIDOMBlob* aBlob)
+PresentationTCPSessionTransport::SendBlob(Blob* aBlob)
 {
   return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
 }

dom/presentation/interfaces/nsIPresentationService.idl

@@ -4,7 +4,6 @@
 
 #include "nsISupports.idl"
 
-interface nsIDOMBlob;
 interface nsIInputStream;
 interface nsIPresentationAvailabilityListener;
 interface nsIPresentationRespondingListener;
@@ -12,6 +11,7 @@ interface nsIPresentationSessionListener;
 interface nsIPresentationTransportBuilderConstructor;
 interface nsIPrincipal;
 
+webidl Blob;
 webidl EventTarget;
 
 %{C++
@@ -120,7 +120,7 @@ interface nsIPresentationService : nsISupports
    */
   void sendSessionBlob(in DOMString sessionId,
                        in uint8_t role,
-                       in nsIDOMBlob blob);
+                       in Blob blob);
 
   /*
    * Close the session.

dom/presentation/interfaces/nsIPresentationSessionTransport.idl

@@ -4,10 +4,11 @@
 
 #include "nsISupports.idl"
 
-interface nsIDOMBlob;
 interface nsIInputStream;
 interface nsINetAddr;
 
+webidl Blob;
+
 %{C++
 #define PRESENTATION_TCP_SESSION_TRANSPORT_CONTRACTID \
   "@mozilla.org/presentation/presentationtcpsessiontransport;1"
@@ -59,7 +60,7 @@ interface nsIPresentationSessionTransport : nsISupports
    * Send the blob to the remote endpoint.
    * @param blob: The input blob to be sent.
    */
-  void sendBlob(in nsIDOMBlob blob);
+  void sendBlob(in Blob blob);
 
   /*
    * Close this session transport.

dom/presentation/ipc/PresentationBuilderParent.cpp

@@ -84,7 +84,7 @@ PresentationSessionTransportIPC::SendBinaryMsg(const nsACString& aData)
 }
 
 NS_IMETHODIMP
-PresentationSessionTransportIPC::SendBlob(nsIDOMBlob* aBlob)
+PresentationSessionTransportIPC::SendBlob(Blob* aBlob)
 {
   return NS_OK;
 }

dom/presentation/ipc/PresentationContentSessionInfo.cpp

@@ -46,7 +46,7 @@ PresentationContentSessionInfo::SendBinaryMsg(const nsACString& aData)
 }
 
 nsresult
-PresentationContentSessionInfo::SendBlob(nsIDOMBlob* aBlob)
+PresentationContentSessionInfo::SendBlob(Blob* aBlob)
 {
   if (NS_WARN_IF(!mTransport)) {
     return NS_ERROR_NOT_AVAILABLE;

dom/presentation/ipc/PresentationContentSessionInfo.h

@@ -44,7 +44,7 @@ public:
 
   nsresult SendBinaryMsg(const nsACString& aData);
 
-  nsresult SendBlob(nsIDOMBlob* aBlob);
+  nsresult SendBlob(Blob* aBlob);
 
   nsresult Close(nsresult aReason);
 

dom/presentation/ipc/PresentationIPCService.cpp

@@ -129,7 +129,7 @@ PresentationIPCService::SendSessionBinaryMsg(const nsAString& aSessionId,
 NS_IMETHODIMP
 PresentationIPCService::SendSessionBlob(const nsAString& aSessionId,
                                         uint8_t aRole,
-                                        nsIDOMBlob* aBlob)
+                                        Blob* aBlob)
 {
   MOZ_ASSERT(NS_IsMainThread());
   MOZ_ASSERT(!aSessionId.IsEmpty());

editor/libeditor/HTMLEditorDataTransfer.cpp

@@ -1045,7 +1045,7 @@ HTMLEditor::InsertObject(const nsACString& aType,
     nsCOMPtr<nsINode> node = do_QueryInterface(aDestinationNode);
     MOZ_ASSERT(node);
 
-    nsCOMPtr<nsIDOMBlob> domBlob = Blob::Create(node->GetOwnerGlobal(), blob);
+    RefPtr<Blob> domBlob = Blob::Create(node->GetOwnerGlobal(), blob);
     NS_ENSURE_TRUE(domBlob, NS_ERROR_FAILURE);
 
     return utils->SlurpBlob(domBlob, node->OwnerDoc()->GetWindow(), br);

editor/nsIEditorUtils.idl

@@ -7,9 +7,10 @@
 #include "nsISupports.idl"
 #include "domstubs.idl"
 
-interface nsIDOMBlob;
 interface mozIDOMWindowProxy;
 
+webidl Blob;
+
 [scriptable, builtinclass, uuid(eb8b8ad9-5d8f-43bd-8ce5-5b943c180d56)]
 interface nsIEditorBlobListener : nsISupports
 {
@@ -27,6 +28,6 @@ interface nsIEditorUtils : nsISupports
   /**
    * Given a blob, returns the data from that blob, asynchronously.
    */
-  void slurpBlob(in nsIDOMBlob aBlob, in mozIDOMWindowProxy aScope,
+  void slurpBlob(in Blob aBlob, in mozIDOMWindowProxy aScope,
                  in nsIEditorBlobListener aListener);
 };

ipc/glue/BackgroundChild.h

@@ -11,8 +11,6 @@
 #include "mozilla/Attributes.h"
 #include "mozilla/ipc/Transport.h"
 
-class nsIDOMBlob;
-
 namespace mozilla {
 namespace dom {
 

js/xpconnect/tests/chrome/test_cloneInto.xul

@@ -49,7 +49,7 @@
     if (a instanceof File)
       return 'file';
 
-    if (a instanceof Ci.nsIDOMBlob)
+    if (a instanceof Blob)
       return 'blob';
 
     if (TypedArrayThings.includes(a.constructor.name))

js/xpconnect/tests/unit/component-blob.js

@@ -27,7 +27,7 @@ BlobComponent.prototype =
     var f1 = new Blob([testContent], {"type" : "text/xml"});
 
     // do some tests
-    Assert.ok(f1 instanceof Ci.nsIDOMBlob, "Should be a DOM Blob");
+    Assert.ok(f1 instanceof Blob, "Should be a DOM Blob");
 
     Assert.ok(!(f1 instanceof File), "Should not be a DOM File");
 

js/xpconnect/tests/unit/test_blob2.js

@@ -11,7 +11,7 @@ function run_test() {
   var f1 = new Blob([testContent], {"type" : "text/xml"});
 
   // do some tests
-  Assert.ok(f1 instanceof Ci.nsIDOMBlob, "Should be a DOM Blob");
+  Assert.ok(f1 instanceof Blob, "Should be a DOM Blob");
 
   Assert.ok(!(f1 instanceof File), "Should not be a DOM File");
 

toolkit/modules/PropertyListUtils.jsm

@@ -69,7 +69,7 @@ var PropertyListUtils = Object.freeze({
   /**
    * Asynchronously reads a file as a property list.
    *
-   * @param aFile (nsIDOMBlob/nsIFile)
+   * @param aFile (Blob/nsIFile)
    *        the file to be read as a property list.
    * @param aCallback
    *        If the property list is read successfully, aPropertyListRoot is set

widget/nsBaseFilePicker.cpp

@@ -53,8 +53,7 @@ LocalFileToDirectoryOrBlob(nsPIDOMWindowInner* aWindow,
     return NS_OK;
   }
 
-  nsCOMPtr<nsIDOMBlob> blob = File::CreateFromFile(aWindow, aFile);
-  blob.forget(aResult);
+  *aResult = ToSupports(File::CreateFromFile(aWindow, aFile).take());
   return NS_OK;
 }
 

widget/nsFilePickerProxy.cpp

@@ -207,7 +207,7 @@ nsFilePickerProxy::GetDomFileOrDirectory(nsISupports** aValue)
   MOZ_ASSERT(mFilesOrDirectories.Length() == 1);
 
   if (mFilesOrDirectories[0].IsFile()) {
-    nsCOMPtr<nsIDOMBlob> blob = mFilesOrDirectories[0].GetAsFile().get();
+    nsCOMPtr<nsISupports> blob = ToSupports(mFilesOrDirectories[0].GetAsFile());
     blob.forget(aValue);
     return NS_OK;
   }
@@ -247,7 +247,7 @@ public:
     uint32_t index = mIndex++;
 
     if (mFilesOrDirectories[index].IsFile()) {
-      nsCOMPtr<nsIDOMBlob> blob = mFilesOrDirectories[index].GetAsFile().get();
+      nsCOMPtr<nsISupports> blob = ToSupports(mFilesOrDirectories[index].GetAsFile());
       blob.forget(aValue);
       return NS_OK;
     }