ozone: Add OzoneSurface object that is owned by compositor, GLSurface

ui/gfx/ozone/surface_ozone_base.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_GFX_OZONE_SURFACE_OZONE_BASE_H_
+#define UI_GFX_OZONE_SURFACE_OZONE_BASE_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "skia/ext/refptr.h"
+#include "ui/gfx/gfx_export.h"
+#include "ui/gfx/ozone/surface_ozone.h"
+
+namespace gfx {
+
+// Base class for in-tree implementations of SurfaceOzone.
+//
+// This adds default implementations of all the methods in SurfaceOzone,
+// for use by in-tree subclasses.
+//
+// If an out-of-tree implementation inherits this, it is possible there
+// will be silent breakage instead of a compile time failure as a result
+// of changes to the interface.
+class GFX_EXPORT SurfaceOzoneBase : public SurfaceOzone {
+ public:
+  SurfaceOzoneBase();
+  virtual ~SurfaceOzoneBase() OVERRIDE;
+
+  // SurfaceOzone:
+  virtual bool InitializeEGL() OVERRIDE;
+  virtual intptr_t /* EGLNativeWindowType */ GetEGLNativeWindow() OVERRIDE;
+  virtual bool InitializeCanvas() OVERRIDE;
+  virtual skia::RefPtr<SkCanvas> GetCanvas() OVERRIDE;
+  virtual bool ResizeCanvas(const gfx::Size& viewport_size) OVERRIDE;
+  virtual bool PresentCanvas() OVERRIDE;
+  virtual scoped_ptr<gfx::VSyncProvider> CreateVSyncProvider() OVERRIDE;
+};
+
+}  // namespace gfx
+
+#endif  // UI_GFX_OZONE_SURFACE_OZONE_BASE_H_