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

content/renderer/media/pepper_platform_video_decoder.cc

Index: content/renderer/media/pepper_platform_video_decoder.cc
diff --git a/content/renderer/media/pepper_platform_video_decoder.cc b/content/renderer/media/pepper_platform_video_decoder.cc
index 37a19d3ec663fba56aa5b9a8e5dfbefee2c2c7a8..ca1d2f23f6cc70219c0baf92ac0e5f49c509bb26 100644
--- a/content/renderer/media/pepper_platform_video_decoder.cc
+++ b/content/renderer/media/pepper_platform_video_decoder.cc
@@ -40,7 +40,7 @@ bool PlatformVideoDecoder::Initialize(
     return false;
 
   // Send IPC message to initialize decoder in GPU process.
-  decoder_ = channel->CreateVideoDecoder(command_buffer_route_id_, profile);
+  decoder_ = channel->CreateVideoDecoder(command_buffer_route_id_);
   return (decoder_ && decoder_->Initialize(profile, this));
 }
 
@@ -102,10 +102,6 @@ void PlatformVideoDecoder::PictureReady(const media::Picture& picture) {
   client_->PictureReady(picture);
 }
 
-void PlatformVideoDecoder::NotifyInitializeDone() {
-  NOTREACHED() << "GpuVideoDecodeAcceleratorHost::Initialize is synchronous!";
-}
-
 void PlatformVideoDecoder::NotifyEndOfBitstreamBuffer(
   int32 bitstream_buffer_id) {
   DCHECK(RenderThreadImpl::current());