Bug 1265427 - nsDOMCameraControl needs an mOwnedStream to be consistent towards its VideoStreamTrack r=me

MozReview-Commit-ID: HfKPa4H7FyH

--HG--
extra : rebase_source : f40927672b9808d86a88e502a14ca68fafdb7497

dom/camera/CameraPreviewMediaStream.cpp

@@ -29,7 +29,7 @@ FakeMediaStreamGraph::DispatchToMainThreadAfterStreamStateUpdate(already_AddRefe
 }
 
 CameraPreviewMediaStream::CameraPreviewMediaStream(DOMMediaStream* aWrapper)
-  : MediaStream(aWrapper)
+  : ProcessedMediaStream(aWrapper)
   , mMutex("mozilla::camera::CameraPreviewMediaStream")
   , mInvalidatePending(0)
   , mDiscardedFrames(0)
@@ -130,6 +130,13 @@ CameraPreviewMediaStream::Invalidate()
   }
 }
 
+void
+CameraPreviewMediaStream::ProcessInput(GraphTime aFrom, GraphTime aTo,
+                                       uint32_t aFlags)
+{
+  return;
+}
+
 void
 CameraPreviewMediaStream::RateLimit(bool aLimit)
 {

dom/camera/CameraPreviewMediaStream.h

@@ -35,7 +35,7 @@ protected:
  * A camera preview requests no delay and no buffering stream,
  * but the SourceMediaStream does not support it.
  */
-class CameraPreviewMediaStream : public MediaStream
+class CameraPreviewMediaStream : public ProcessedMediaStream
 {
   typedef mozilla::layers::Image Image;
 
@@ -56,6 +56,8 @@ public:
 
   void Invalidate();
 
+  void ProcessInput(GraphTime aFrom, GraphTime aTo, uint32_t aFlags) override;
+
   // Call these on any thread.
   void SetCurrentFrame(const gfx::IntSize& aIntrinsicSize, Image* aImage);
   void ClearCurrentFrame();

dom/camera/DOMCameraControl.cpp

@@ -262,6 +262,7 @@ nsDOMCameraControl::nsDOMCameraControl(uint32_t aCameraId,
 {
   DOM_CAMERA_LOGT("%s:%d : this=%p\n", __func__, __LINE__, this);
   mInput = new CameraPreviewMediaStream(this);
+  mOwnedStream = mInput;
 
   BindToOwner(aWindow);