Implement video frame acknowledgements in the chromoting protocol.

remoting/host/video_scheduler.h

Index: remoting/host/video_scheduler.h
diff --git a/remoting/host/video_scheduler.h b/remoting/host/video_scheduler.h
index 3bcf27723f9d64f08ad97ba9d9c08e3c784dfbe0..215def01e007b6eaf40cbb5083de3d775a3a9e9e 100644
--- a/remoting/host/video_scheduler.h
+++ b/remoting/host/video_scheduler.h
@@ -33,13 +33,13 @@ class CursorShapeInfo;
 namespace protocol {
 class CursorShapeInfo;
 class CursorShapeStub;
-class VideoStub;
+class VideoSender;
 }  // namespace protocol
 
 // Class responsible for scheduling frame captures from a
 // webrtc::DesktopCapturer, delivering them to a VideoEncoder to encode, and
-// finally passing the encoded video packets to the specified VideoStub to send
-// on the network.
+// finally passing the encoded video packets to the specified VideoSender to
+// send on the network.
 //
 // THREADING
 //
@@ -92,7 +92,7 @@ class VideoScheduler : public base::RefCountedThreadSafe<VideoScheduler>,
       scoped_ptr<webrtc::MouseCursorMonitor> mouse_cursor_monitor,
       scoped_ptr<VideoEncoder> encoder,
       protocol::CursorShapeStub* cursor_stub,
-      protocol::VideoStub* video_stub);
+      protocol::VideoSender* video_stub);
 
   // webrtc::DesktopCapturer::Callback implementation.
   webrtc::SharedMemory* CreateSharedMemory(size_t size) override;
@@ -189,7 +189,7 @@ class VideoScheduler : public base::RefCountedThreadSafe<VideoScheduler>,
   // Interfaces through which video frames and cursor shapes are passed to the
   // client. These members are always accessed on the network thread.
   protocol::CursorShapeStub* cursor_stub_;
-  protocol::VideoStub* video_stub_;
+  protocol::VideoSender* video_sender_;
 
   // Timer used to schedule CaptureNextFrame().
   scoped_ptr<base::OneShotTimer<VideoScheduler> > capture_timer_;