Command to mark surface inactive, so gpu process can release resources.

content/common/gpu/gpu_command_buffer_stub.cc

Index: content/common/gpu/gpu_command_buffer_stub.cc
diff --git a/content/common/gpu/gpu_command_buffer_stub.cc b/content/common/gpu/gpu_command_buffer_stub.cc
index 2f8019a2b802a433bda98024fb2d3ae4177f31f8..c296b4d8a2c35e1c74a9832abfd7b7ec43c21bd4 100644
--- a/content/common/gpu/gpu_command_buffer_stub.cc
+++ b/content/common/gpu/gpu_command_buffer_stub.cc
@@ -108,6 +108,8 @@ bool GpuCommandBufferStub::OnMessageReceived(const IPC::Message& message) {
                                     OnCreateVideoDecoder)
     IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_DestroyVideoDecoder,
                         OnDestroyVideoDecoder)
+    IPC_MESSAGE_HANDLER(GpuCommandBufferMsg_SetSurfaceVisible,
+                        OnSetSurfaceVisible)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -507,4 +509,8 @@ void GpuCommandBufferStub::OnDestroyVideoDecoder(int decoder_route_id) {
   video_decoders_.Remove(decoder_route_id);
 }
 
+void GpuCommandBufferStub::OnSetSurfaceVisible(bool visible) {
+  surface_->SetVisible(visible);
+}
+
 #endif  // defined(ENABLE_GPU)