Revert of Mac Overlays: Add GPU back-pressure

gpu/command_buffer/service/gl_context_virtual.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gl_context_virtual.h"
 
 #include "base/callback.h"
 #include "gpu/command_buffer/service/gl_state_restorer_impl.h"
-#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "ui/gl/gl_gl_api_implementation.h"
 #include "ui/gl/gl_surface.h"
 #include "ui/gl/gpu_preference.h"
 #include "ui/gl/gpu_timing.h"
-#include "ui/gl/scoped_api.h"
 
 namespace gpu {
 
 GLContextVirtual::GLContextVirtual(
     gfx::GLShareGroup* share_group,
     gfx::GLContext* shared_context,
     base::WeakPtr<gles2::GLES2Decoder> decoder)
   : GLContext(share_group),
     shared_context_(shared_context),
     decoder_(decoder) {
@@ skipping 98 matching lines @@
   gfx::ScopedSetGLToRealGLApi scoped_set_gl_api;
   GetGLStateRestorer()->RestoreState(NULL);
   shared_context_->SetStateWasDirtiedExternally(false);
 }
 
 GLContextVirtual::~GLContextVirtual() {
   Destroy();
 }
 
 }  // namespace gpu