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

gpu/command_buffer/service/gles2_cmd_decoder.h

Index: gpu/command_buffer/service/gles2_cmd_decoder.h
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.h b/gpu/command_buffer/service/gles2_cmd_decoder.h
index 118c27dfd055d106ee635ea4933bdbfd98eb8662..94571bd097f1751a1cb47787bebfbbaaea644a66 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.h
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.h
@@ -107,6 +107,9 @@ class GLES2Decoder : public CommonDecoder {
   virtual void SetResizeCallback(
       Callback1<gfx::Size>::Type* callback) = 0;
 
+  virtual void SetSurfaceVisibleCallback(
+      Callback1<bool>::Type* callback) = 0;
+
 #if defined(OS_MACOSX)
   // Sets a callback which is called when a SwapBuffers command is processed.
   virtual void SetSwapBuffersCallback(Callback0::Type* callback) = 0;