Revert of Revert of ozone: gpu: Add plumbing for platform-specific gpu messaging

ui/ozone/ozone_platform.h

 // Copyright 2013 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 UI_OZONE_OZONE_PLATFORM_H_
 #define UI_OZONE_OZONE_PLATFORM_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "ui/ozone/ozone_export.h"
 
 namespace ui {
 
 class CursorFactoryOzone;
 class EventFactoryOzone;
 class NativeDisplayDelegate;
 class SurfaceFactoryOzone;
 class TouchscreenDeviceManager;
+class GpuPlatformSupport;
+class GpuPlatformSupportHost;
 
 // Base class for Ozone platform implementations.
 //
 // Ozone platforms must override this class and implement the virtual
 // GetFooFactoryOzone() methods to provide implementations of the
 // various ozone interfaces.
 //
 // The OzonePlatform subclass can own any state needed by the
 // implementation that is shared between the various ozone interfaces,
 // such as a connection to the windowing system.
@@ skipping 15 matching lines @@
   static void InitializeForGPU();
 
   static OzonePlatform* GetInstance();
 
   // Factory getters to override in subclasses. The returned objects will be
   // injected into the appropriate layer at startup. Subclasses should not
   // inject these objects themselves. Ownership is retained by OzonePlatform.
   virtual ui::SurfaceFactoryOzone* GetSurfaceFactoryOzone() = 0;
   virtual ui::EventFactoryOzone* GetEventFactoryOzone() = 0;
   virtual ui::CursorFactoryOzone* GetCursorFactoryOzone() = 0;
+  virtual ui::GpuPlatformSupport* GetGpuPlatformSupport() = 0;
+  virtual ui::GpuPlatformSupportHost* GetGpuPlatformSupportHost() = 0;
 #if defined(OS_CHROMEOS)
   virtual scoped_ptr<ui::NativeDisplayDelegate>
       CreateNativeDisplayDelegate() = 0;
   virtual scoped_ptr<ui::TouchscreenDeviceManager>
       CreateTouchscreenDeviceManager() = 0;
 #endif
 
  private:
   virtual void InitializeUI() = 0;
   virtual void InitializeGPU() = 0;
 
   static void CreateInstance();
 
   static OzonePlatform* instance_;
 
   DISALLOW_COPY_AND_ASSIGN(OzonePlatform);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_OZONE_PLATFORM_H_