cc: Add OutputSurface state snapshots.

components/display_compositor/buffer_queue.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 COMPONENTS_DISPLAY_COMPOSITOR_BUFFER_QUEUE_H_
 #define COMPONENTS_DISPLAY_COMPOSITOR_BUFFER_QUEUE_H_
 
 #include <stddef.h>
 
 #include <deque>
 #include <memory>
 #include <vector>
 
+#include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "components/display_compositor/display_compositor_export.h"
 #include "gpu/ipc/common/surface_handle.h"
+#include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/buffer_types.h"
 #include "ui/gfx/color_space.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace gfx {
 class GpuMemoryBuffer;
 }
 
 namespace gpu {
@@ skipping 28 matching lines @@
   void BindFramebuffer();
   void SwapBuffers(const gfx::Rect& damage);
   void PageFlipComplete();
   void Reshape(const gfx::Size& size,
                float scale_factor,
                const gfx::ColorSpace& color_space,
                bool use_stencil);
 
   void RecreateBuffers();
 
+  void ReadbackDisplayedFramebuffer(SkBitmap* bitmap,
+                                    const base::Callback<void(bool)>& callback);
+
   uint32_t current_texture_id() const {
     return current_surface_ ? current_surface_->texture : 0;
   }
   uint32_t fbo() const { return fbo_; }
   uint32_t internal_format() const { return internal_format_; }
 
  private:
   friend class BufferQueueTest;
   friend class AllocatedSurface;
 
@@ skipping 54 matching lines @@
   GLHelper* gl_helper_;
   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager_;
   gpu::SurfaceHandle surface_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(BufferQueue);
 };
 
 }  // namespace display_compositor
 
 #endif  // COMPONENTS_DISPLAY_COMPOSITOR_BUFFER_QUEUE_H_