Make VEA client of command buffer; move sync. IPC to VDA/VEA::Initialize()

content/renderer/media/rtc_video_encoder.cc

Index: content/renderer/media/rtc_video_encoder.cc
diff --git a/content/renderer/media/rtc_video_encoder.cc b/content/renderer/media/rtc_video_encoder.cc
index f59e0bfeb5f51afbd87428d462ed8143b75ebcb3..3b3325ab81b36c77855bb4f1f58a7353cecd081d 100644
--- a/content/renderer/media/rtc_video_encoder.cc
+++ b/content/renderer/media/rtc_video_encoder.cc
@@ -75,7 +75,6 @@ class RTCVideoEncoder::Impl
   void Destroy();
 
   // media::VideoEncodeAccelerator::Client implementation.
-  virtual void NotifyInitializeDone() OVERRIDE;
   virtual void RequireBitstreamBuffers(unsigned int input_count,
                                        const gfx::Size& input_coded_size,
                                        size_t output_buffer_size) OVERRIDE;
@@ -192,11 +191,14 @@ void RTCVideoEncoder::Impl::CreateAndInitializeVEA(
     return;
   }
   input_visible_size_ = input_visible_size;
-  video_encoder_->Initialize(media::VideoFrame::I420,
-                             input_visible_size_,
-                             profile,
-                             bitrate * 1000,
-                             this);
+  if (!video_encoder_->Initialize(media::VideoFrame::I420,
+                                  input_visible_size_,
+                                  profile,
+                                  bitrate * 1000,
+                                  this)) {
+    NOTIFY_ERROR(media::VideoEncodeAccelerator::kInvalidArgumentError);
+    return;
+  }
 }
 
 void RTCVideoEncoder::Impl::Enqueue(const webrtc::I420VideoFrame* input_frame,
@@ -275,11 +277,6 @@ void RTCVideoEncoder::Impl::Destroy() {
     video_encoder_.release()->Destroy();
 }
 
-void RTCVideoEncoder::Impl::NotifyInitializeDone() {
-  DVLOG(3) << "Impl::NotifyInitializeDone()";
-  DCHECK(thread_checker_.CalledOnValidThread());
-}
-
 void RTCVideoEncoder::Impl::RequireBitstreamBuffers(
     unsigned int input_count,
     const gfx::Size& input_coded_size,