It is time.

ui/ozone/public/ozone_platform.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_PUBLIC_OZONE_PLATFORM_H_
-#define UI_OZONE_PUBLIC_OZONE_PLATFORM_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "ui/ozone/ozone_export.h"
-
-namespace gfx {
-class Rect;
-}
-
-namespace ui {
-
-class CursorFactoryOzone;
-class NativeDisplayDelegate;
-class SurfaceFactoryOzone;
-class GpuPlatformSupport;
-class GpuPlatformSupportHost;
-class PlatformWindow;
-class PlatformWindowDelegate;
-
-// 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.
-//
-// A platform is free to use different implementations of each
-// interface depending on the context. You can, for example, create
-// different objects depending on the underlying hardware, command
-// line flags, or whatever is appropriate for the platform.
-class OZONE_EXPORT OzonePlatform {
- public:
-  OzonePlatform();
-  virtual ~OzonePlatform();
-
-  // Initializes the subsystems/resources necessary for the UI process (e.g.
-  // events, surface, etc.)
-  static void InitializeForUI();
-
-  // Initializes the subsystems/resources necessary for the GPU process.
-  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::CursorFactoryOzone* GetCursorFactoryOzone() = 0;
-  virtual ui::GpuPlatformSupport* GetGpuPlatformSupport() = 0;
-  virtual ui::GpuPlatformSupportHost* GetGpuPlatformSupportHost() = 0;
-  virtual scoped_ptr<PlatformWindow> CreatePlatformWindow(
-      PlatformWindowDelegate* delegate,
-      const gfx::Rect& bounds) = 0;
-  virtual scoped_ptr<ui::NativeDisplayDelegate>
-      CreateNativeDisplayDelegate() = 0;
-
- 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_PUBLIC_OZONE_PLATFORM_H_