Add a flag in StopCapture to allow event handler to choose event notification.

content/renderer/media/video_capture_impl.h

Index: content/renderer/media/video_capture_impl.h
===================================================================
--- content/renderer/media/video_capture_impl.h	(revision 102594)
+++ content/renderer/media/video_capture_impl.h	(working copy)
@@ -17,6 +17,7 @@
 
 namespace base {
 class MessageLoopProxy;
+class WaitableEvent;
 }
 
 class VideoCaptureImpl
@@ -25,13 +26,14 @@
  public:
   // media::VideoCapture interface.
   virtual void StartCapture(media::VideoCapture::EventHandler* handler,
-                            const VideoCaptureCapability& capability);
-  virtual void StopCapture(media::VideoCapture::EventHandler* handler);
-  virtual void FeedBuffer(scoped_refptr<VideoFrameBuffer> buffer);
-  virtual bool CaptureStarted();
-  virtual int CaptureWidth();
-  virtual int CaptureHeight();
-  virtual int CaptureFrameRate();
+                            const VideoCaptureCapability& capability) OVERRIDE;
+  virtual void StopCapture(media::VideoCapture::EventHandler* handler,
+                           bool need_notification) OVERRIDE;
+  virtual void FeedBuffer(scoped_refptr<VideoFrameBuffer> buffer) OVERRIDE;
+  virtual bool CaptureStarted() OVERRIDE;
+  virtual int CaptureWidth() OVERRIDE;
+  virtual int CaptureHeight() OVERRIDE;
+  virtual int CaptureFrameRate() OVERRIDE;
 
   // VideoCaptureMessageFilter::Delegate interface.
   virtual void OnBufferCreated(base::SharedMemoryHandle handle,
@@ -68,7 +70,8 @@
 
   void DoStartCapture(media::VideoCapture::EventHandler* handler,
                       const VideoCaptureCapability& capability);
-  void DoStopCapture(media::VideoCapture::EventHandler* handler);
+  void DoStopCapture(media::VideoCapture::EventHandler* handler,
+                     base::WaitableEvent* completion);
   void DoFeedBuffer(scoped_refptr<VideoFrameBuffer> buffer);
 
   void DoBufferCreated(base::SharedMemoryHandle handle,