chromeos: Add SurfaceServiceProvider.

ash/surfaces/surface_controller.h

+// Copyright 2015 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 ASH_SURFACES_SURFACE_CONTROLLER_H_
+#define ASH_SURFACES_SURFACE_CONTROLLER_H_
+
+#include "base/basictypes.h"
+#include "base/containers/scoped_ptr_hash_map.h"
+#include "base/files/scoped_file.h"
+#include "base/observer_list.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/gpu_memory_buffer.h"
+
+namespace ash {
+
+class SurfaceController {
+ public:
+  class Observer {
+   public:
+    virtual void OnTestSurfaceGpuMemoryBufferChanged() = 0;
+
+   protected:
+    virtual ~Observer() {}
+  };
+
+  using GraphicsBufferCreatedCallback = base::Callback<void(int32 buffer)>;
+
+  SurfaceController();
+  ~SurfaceController();
+
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+
+  void CreateGraphicsBufferFromGpuMemoryBufferHandle(
+      const gfx::GpuMemoryBufferHandle& handle,
+      const gfx::Size& size,
+      gfx::BufferFormat format,
+      const GraphicsBufferCreatedCallback& callback);
+  void DestroyGraphicsBuffer(int32 buffer);
+  void SetTestSurfaceContents(int32 buffer);
+
+  gfx::GpuMemoryBuffer* GetTestSurfaceGpuMemoryBuffer() const;
+
+ private:
+  base::ScopedPtrHashMap<int32, scoped_ptr<gfx::GpuMemoryBuffer>>
+      gpu_memory_buffers_;
+  base::ObserverList<Observer> observers_;
+  int32 next_buffer_;
+  int32 test_surface_buffer_;
+
+  DISALLOW_COPY_AND_ASSIGN(SurfaceController);
+};
+
+}  // namespace ash
+
+#endif  // ASH_SURFACES_SURFACE_CONTROLLER_H_