Make cc::CompositorFrames movable [Part 1 of 2]

cc/output/renderer.h

 // Copyright 2012 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 CC_OUTPUT_RENDERER_H_
 #define CC_OUTPUT_RENDERER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
+#include "cc/output/compositor_frame_metadata.h"
 #include "cc/output/renderer_capabilities.h"
 #include "cc/output/renderer_settings.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace cc {
 
 class CompositorFrameAck;
-class CompositorFrameMetadata;
 class RenderPass;
 class RenderPassId;
 class ScopedResource;
 class Task;
 
 typedef std::vector<std::unique_ptr<RenderPass>> RenderPassList;
 
 struct RendererCapabilitiesImpl {
   RendererCapabilitiesImpl();
   ~RendererCapabilitiesImpl();
@@ skipping 41 matching lines @@
   virtual void DrawFrame(RenderPassList* render_passes_in_draw_order,
                          float device_scale_factor,
                          const gfx::Rect& device_viewport_rect,
                          const gfx::Rect& device_clip_rect,
                          bool disable_picture_quad_image_filtering) = 0;
 
   // Waits for rendering to finish.
   virtual void Finish() = 0;
 
   // Puts backbuffer onscreen.
-  virtual void SwapBuffers(const CompositorFrameMetadata& metadata) = 0;
+  virtual void SwapBuffers(CompositorFrameMetadata metadata) = 0;
   virtual void ReceiveSwapBuffersAck(const CompositorFrameAck& ack) {}
 
   bool visible() const { return visible_; }
   void SetVisible(bool visible);
 
  protected:
   Renderer(RendererClient* client, const RendererSettings* settings)
       : client_(client), settings_(settings), visible_(true) {}
 
   virtual void DidChangeVisibility() = 0;
 
   RendererClient* client_;
   const RendererSettings* settings_;
   bool visible_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Renderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_RENDERER_H_