[Ozone-GBM] Add basic support for display configuration over IPC

ui/ozone/platform/dri/gpu_platform_support_gbm.h

 // Copyright 2014 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_PLATFORM_DRI_GPU_PLATFORM_SUPPORT_GBM_H_
 #define UI_OZONE_PLATFORM_DRI_GPU_PLATFORM_SUPPORT_GBM_H_
 
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/ozone/public/gpu_platform_support.h"
 
 class SkBitmap;
 
 namespace gfx {
 class Point;
 }
 
 namespace ui {
 
 class DriSurfaceFactory;
 
 class GpuPlatformSupportGbm : public GpuPlatformSupport {
  public:
   GpuPlatformSupportGbm(DriSurfaceFactory* dri);
+  virtual ~GpuPlatformSupportGbm();
+
+  void AddHandler(scoped_ptr<GpuPlatformSupport> handler);
 
   // GpuPlatformSupport:
   virtual void OnChannelEstablished(IPC::Sender* sender) OVERRIDE;
 
   // IPC::Listener:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
  private:
   IPC::Sender* sender_;
 
   void OnCursorSet(gfx::AcceleratedWidget widget,
                    const SkBitmap& bitmap,
                    const gfx::Point& location);
   void OnCursorMove(gfx::AcceleratedWidget widget, const gfx::Point& location);
 
   DriSurfaceFactory* dri_;
+  ScopedVector<GpuPlatformSupport> handlers_;
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRI_GPU_PLATFORM_SUPPORT_GBM_H_