Add CCDelegatingRenderer, and corresponding IPCs

content/renderer/gpu/compositor_output_surface.cc

Index: content/renderer/gpu/compositor_output_surface.cc
diff --git a/content/renderer/gpu/compositor_output_surface.cc b/content/renderer/gpu/compositor_output_surface.cc
index e50a1e93aa420458328ac9fa3628bb0006a3db65..f2577bb7374368d2d780d934d91b2decc2b0663b 100644
--- a/content/renderer/gpu/compositor_output_surface.cc
+++ b/content/renderer/gpu/compositor_output_surface.cc
@@ -4,11 +4,14 @@
 
 #include "content/renderer/gpu/compositor_output_surface.h"
 
+#include "base/command_line.h"
 #include "base/message_loop_proxy.h"
 #include "content/common/view_messages.h"
+#include "content/public/common/content_switches.h"
 #include "content/renderer/render_thread_impl.h"
 #include "ipc/ipc_forwarding_message_filter.h"
 #include "ipc/ipc_sync_channel.h"
+#include "ipc/ipc_sync_message_filter.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebCompositorOutputSurfaceClient.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 
@@ -21,7 +24,10 @@ using WebKit::WebCompositorSoftwareOutputDevice;
 IPC::ForwardingMessageFilter* CompositorOutputSurface::CreateFilter(
     base::TaskRunner* target_task_runner)
 {
-  uint32 messages_to_filter[] = {ViewMsg_UpdateVSyncParameters::ID};
+  uint32 messages_to_filter[] = {
+    ViewMsg_UpdateVSyncParameters::ID,
+    ViewMsg_SwapCompositorFrameACK::ID,
+  };
   return new IPC::ForwardingMessageFilter(
       messages_to_filter, arraysize(messages_to_filter),
       target_task_runner);
@@ -38,7 +44,9 @@ CompositorOutputSurface::CompositorOutputSurface(
       context3D_(context3D),
       software_device_(software_device) {
   DCHECK(output_surface_filter_);
-  capabilities_.hasParentCompositor = false;
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  capabilities_.hasParentCompositor = command_line->HasSwitch(
+      switches::kEnableDelegatedRenderer);
   DetachFromThread();
 }
 
@@ -87,9 +95,9 @@ WebCompositorSoftwareOutputDevice* CompositorOutputSurface::softwareDevice()
 }
 
 void CompositorOutputSurface::sendFrameToParentCompositor(
-    const WebKit::WebCompositorFrame&) {
+    const WebKit::WebCompositorFrame& frame) {
   DCHECK(CalledOnValidThread());
-  NOTREACHED();
+  Send(new ViewHostMsg_SwapCompositorFrame(routing_id_, frame));
 }
 
 void CompositorOutputSurface::OnMessageReceived(const IPC::Message& message) {
@@ -98,6 +106,7 @@ void CompositorOutputSurface::OnMessageReceived(const IPC::Message& message) {
     return;
   IPC_BEGIN_MESSAGE_MAP(CompositorOutputSurface, message)
     IPC_MESSAGE_HANDLER(ViewMsg_UpdateVSyncParameters, OnUpdateVSyncParameters);
+    IPC_MESSAGE_HANDLER(ViewMsg_SwapCompositorFrameACK, OnSwapCompositorFrameACK);
   IPC_END_MESSAGE_MAP()
 }
 
@@ -112,3 +121,12 @@ void CompositorOutputSurface::OnUpdateVSyncParameters(
       static_cast<double>(base::Time::kMicrosecondsPerSecond);
   client_->onVSyncParametersChanged(monotonicTimebase, intervalInSeconds);
 }
+
+void CompositorOutputSurface::OnSwapCompositorFrameACK(
+    const WebKit::WebCompositorFrameAck& ack) {
+  client_->onSendFrameToParentCompositorAck(ack);
+}
+
+bool CompositorOutputSurface::Send(IPC::Message* message) {
+  return ChildThread::current()->sync_message_filter()->Send(message);
+}