Add media::VideoEncodeAccelerator with WebRTC integration

content/common/gpu/client/gpu_channel_host.cc

Index: content/common/gpu/client/gpu_channel_host.cc
diff --git a/content/common/gpu/client/gpu_channel_host.cc b/content/common/gpu/client/gpu_channel_host.cc
index 601c06d9dac1073b9af4c16652c61ded8cf3d6e0..64b7aa954dd404491a07006574f6eacb370b2a6a 100644
--- a/content/common/gpu/client/gpu_channel_host.cc
+++ b/content/common/gpu/client/gpu_channel_host.cc
@@ -13,6 +13,7 @@
 #include "base/posix/eintr_wrapper.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/common/gpu/client/command_buffer_proxy_impl.h"
+#include "content/common/gpu/client/gpu_video_encode_accelerator_host.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "ipc/ipc_sync_message_filter.h"
@@ -184,6 +185,25 @@ scoped_ptr<media::VideoDecodeAccelerator> GpuChannelHost::CreateVideoDecoder(
   return proxy->CreateVideoDecoder(profile, client).Pass();
 }
 
+scoped_ptr<media::VideoEncodeAccelerator> GpuChannelHost::CreateVideoEncoder(

[Ami GONE FROM CHROMIUM, 2013/07/31 23:01:12]

I'm surprised by the asymmetry between CVD() and CED() (and the reflection of
that in ownership semantics, IPC message differences, and so on).  Are you
planning to make the decode side look like the encode side, or do you have a
reason for making them different?

[sheu, 2013/08/02 01:27:49]

Decode is tied to the CommandBufferImplProxy, since it's tied to a specific
graphics context (since it uses GL).  For encode, we're tied to the GpuChannel
since here is no graphics context dependency.  (That might change if we add
TextureVideoFrame support later.)

+    media::VideoEncodeAccelerator::Client* client) {
+  TRACE_EVENT0("gpu", "GpuChannelHost::CreateVideoEncoder");
+
+  scoped_ptr<media::VideoEncodeAccelerator> vea;
+  int32 route_id;
+  if (!Send(new GpuChannelMsg_CreateVideoEncoder(&route_id))) {
+    return vea.Pass();
+  }
+  if (route_id == MSG_ROUTING_NONE)
+    return vea.Pass();
+
+  GpuVideoEncodeAcceleratorHost* vea_host =
+      new GpuVideoEncodeAcceleratorHost(client, this, route_id);
+  AddRoute(route_id, vea_host->AsWeakPtr());
+  vea.reset(vea_host);
+  return vea.Pass();
+}
+
 void GpuChannelHost::DestroyCommandBuffer(
     CommandBufferProxyImpl* command_buffer) {
   TRACE_EVENT0("gpu", "GpuChannelHost::DestroyCommandBuffer");