Support impl-side painting in Mandoline.

components/view_manager/gles2/mojo_gpu_memory_buffer.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 COMPONENTS_VIEW_MANAGER_GLES2_MOJO_GPU_MEMORY_BUFFER_H_
+#define COMPONENTS_VIEW_MANAGER_GLES2_MOJO_GPU_MEMORY_BUFFER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/gpu_memory_buffer.h"
+
+namespace gles2 {
+
+class MojoGpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
+ public:
+  MojoGpuMemoryBufferImpl(const gfx::Size& size,
+                          Format format,
+                          scoped_ptr<base::SharedMemory> shared_memory);
+  ~MojoGpuMemoryBufferImpl() override;
+
+
+  static scoped_ptr<gfx::GpuMemoryBuffer> Create(const gfx::Size& size,
+                                                 Format format,
+                                                 Usage usage);
+
+  static MojoGpuMemoryBufferImpl* FromClientBuffer(ClientBuffer buffer);
+
+  // Overridden from gfx::GpuMemoryBuffer:
+  bool Map(void** data) override;
+  void Unmap() override;
+  bool IsMapped() const override;
+  Format GetFormat() const override;
+  void GetStride(int* stride) const override;
+  gfx::GpuMemoryBufferHandle GetHandle() const override;
+  ClientBuffer AsClientBuffer() override;
+
+ private:
+  const gfx::Size size_;
+  gfx::GpuMemoryBuffer::Format format_;
+  scoped_ptr<base::SharedMemory> shared_memory_;
+  bool mapped_;
+
+  DISALLOW_COPY_AND_ASSIGN(MojoGpuMemoryBufferImpl);
+};
+
+}  // gles2
+
+#endif  // COMPONENTS_VIEW_MANAGER_GLES2_MOJO_GPU_MEMORY_BUFFER_H_