Rework FlushSync to return early if commands have been processed since the last update

gpu/demos/framework/plugin.h

-// Copyright (c) 2011 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.
-
-#ifndef GPU_DEMOS_FRAMEWORK_PLUGIN_H_
-#define GPU_DEMOS_FRAMEWORK_PLUGIN_H_
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "gpu/demos/framework/demo.h"
-#include "gpu/pgl/pgl.h"
-#include "third_party/npapi/bindings/nphostapi.h"
-
-namespace gpu {
-namespace demos {
-
-// Acts as a framework for pepper3d demos. It is in fact a pepper plugin with
-// a pepper3d device. It delegates all rendering tasks to demo object.
-class Plugin : public NPObject {
- public:
-  explicit Plugin(NPP npp);
-  ~Plugin();
-
-  static NPClass* GetPluginClass();
-
-  NPP npp() const { return npp_; }
-  void New(NPMIMEType pluginType, int16 argc, char* argn[], char* argv[]);
-  void SetWindow(const NPWindow& window);
-  int32 HandleEvent(const NPPepperEvent& event);
-
-  // Called continuously for animated demos.
-  void Tick();
-
-  // Called by the browser to paint the window.
-  void Paint();
-
- private:
-  bool CreateContext();
-  void DestroyContext();
-
-  // This class object needs to be safely casted to NPObject* and cross
-  // c-c++ module boundaries. To accomplish that this class should not have
-  // any virtual member function.
-  NPP npp_;
-
-  NPDevice* device3d_;
-  NPDeviceContext3D context3d_;
-  PGLContext pgl_context_;
-  scoped_ptr<Demo> demo_;
-
-  DISALLOW_COPY_AND_ASSIGN(Plugin);
-};
-
-extern NPNetscapeFuncs* g_browser;
-
-}  // namespace demos
-}  // namespace gpu
-#endif  // GPU_DEMOS_FRAMEWORK_PLUGIN_H_