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 2fe7604ef24e5cb0e1b0e74193048f22c4b24c6c..1ea55c606b3d1696d6c1941bd4aaa82745826747 100644
--- a/content/common/gpu/gpu_command_buffer_stub.cc
+++ b/content/common/gpu/gpu_command_buffer_stub.cc
@@ -106,6 +106,8 @@ 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()
 
@@ -497,4 +499,8 @@ 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)