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

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index d6c513ec186ac4fa6986d0531ebcf0ccd48b3917..aceb6aa2749e715c665c68939857715363832a21 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -477,6 +477,8 @@ class GLES2DecoderImpl : public base::SupportsWeakPtr<GLES2DecoderImpl>,
 
   virtual void SetResizeCallback(Callback1<gfx::Size>::Type* callback);
 
+  virtual void SetSurfaceVisibleCallback(Callback1<bool>::Type* callback);
+
 #if defined(OS_MACOSX)
   virtual void SetSwapBuffersCallback(Callback0::Type* callback);
 #endif
@@ -1284,6 +1286,8 @@ class GLES2DecoderImpl : public base::SupportsWeakPtr<GLES2DecoderImpl>,
 
   scoped_ptr<Callback1<gfx::Size>::Type> resize_callback_;
 
+  scoped_ptr<Callback1<bool>::Type> surface_visible_callback_;
+
 #if defined(OS_MACOSX)
   scoped_ptr<Callback0::Type> swap_buffers_callback_;
 #endif
@@ -2295,6 +2299,11 @@ void GLES2DecoderImpl::SetResizeCallback(
   resize_callback_.reset(callback);
 }
 
+void GLES2DecoderImpl::SetSurfaceVisibleCallback(
+    Callback1<bool>::Type* callback) {
+  surface_visible_callback_.reset(callback);
+}
+
 #if defined(OS_MACOSX)
 void GLES2DecoderImpl::SetSwapBuffersCallback(Callback0::Type* callback) {
   swap_buffers_callback_.reset(callback);
@@ -2578,6 +2587,21 @@ error::Error GLES2DecoderImpl::HandleResizeCHROMIUM(
   return error::kNoError;
 }
 
+error::Error GLES2DecoderImpl::HandleSetSurfaceVisibleCHROMIUM(
+    uint32 immediate_data_size, const gles2::SetSurfaceVisibleCHROMIUM& c) {
+  bool visible = !!static_cast<GLboolean>(c.visible);
+  TRACE_EVENT1("gpu", "glSetSurfaceVisibleChromium", "visible", visible);
+
+  if (surface_visible_callback_.get()) {
+    surface_visible_callback_->Run(visible);
+  } else {
+    printf("[ . ] No callback (no image xport surface?)!\n\n");
+    fflush(stdout);
+  }
+
+  return error::kNoError;
+}
+
 const char* GLES2DecoderImpl::GetCommandName(unsigned int command_id) const {
   if (command_id > kStartPoint && command_id < kNumCommands) {
     return gles2::GetCommandName(static_cast<CommandId>(command_id));