Route D3D VSync signal to Compositor

gpu/ipc/service/gpu_command_buffer_stub.cc

Index: gpu/ipc/service/gpu_command_buffer_stub.cc
diff --git a/gpu/ipc/service/gpu_command_buffer_stub.cc b/gpu/ipc/service/gpu_command_buffer_stub.cc
index 3f41a30555095398eacb3ddab053551bfa5bfb3d..9ce58dc37408c4fdaf75e17f77add94816a914cc 100644
--- a/gpu/ipc/service/gpu_command_buffer_stub.cc
+++ b/gpu/ipc/service/gpu_command_buffer_stub.cc
@@ -374,6 +374,10 @@ void GpuCommandBufferStub::UpdateVSyncParameters(base::TimeTicks timebase,
                                                      interval));
 }
 
+void GpuCommandBufferStub::AddFilter(IPC::MessageFilter* message_filter) {
+  return channel_->AddFilter(message_filter);
+}
+
 bool GpuCommandBufferStub::IsScheduled() {
   return (!executor_.get() || executor_->scheduled());
 }