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

content/browser/compositor/gpu_output_surface_mac.h

 // Copyright 2016 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 CONTENT_BROWSER_COMPOSITOR_GPU_OUTPUT_SURFACE_MAC_H_
 #define CONTENT_BROWSER_COMPOSITOR_GPU_OUTPUT_SURFACE_MAC_H_
 
 #include "content/browser/compositor/gpu_surfaceless_browser_compositor_output_surface.h"
 
 namespace content {
 
 class GpuOutputSurfaceMac
     : public GpuSurfacelessBrowserCompositorOutputSurface {
  public:
   GpuOutputSurfaceMac(
       scoped_refptr<ContextProviderCommandBuffer> context,
       gpu::SurfaceHandle surface_handle,
       scoped_refptr<ui::CompositorVSyncManager> vsync_manager,
       cc::SyntheticBeginFrameSource* begin_frame_source,
       std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
           overlay_candidate_validator,
       gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager);
   ~GpuOutputSurfaceMac() override;
 
   // cc::OutputSurface implementation.
-  void SwapBuffers(cc::CompositorFrame* frame) override;
+  void SwapBuffers(cc::CompositorFrame frame) override;
   bool SurfaceIsSuspendForRecycle() const override;
 
   // BrowserCompositorOutputSurface implementation.
   void OnGpuSwapBuffersCompleted(
       const std::vector<ui::LatencyInfo>& latency_info,
       gfx::SwapResult result,
       const gpu::GpuProcessHostedCALayerTreeParamsMac* params_mac) override;
   void SetSurfaceSuspendedForRecycle(bool suspended) override;
 
  private:
@@ skipping 14 matching lines @@
     SHOULD_NOT_SHOW_FRAMES_NO_SWAP_AFTER_SUSPENDED,
   };
   ShouldShowFramesState should_show_frames_state_ = SHOULD_SHOW_FRAMES;
 
   DISALLOW_COPY_AND_ASSIGN(GpuOutputSurfaceMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_GPU_OUTPUT_SURFACE_MAC_H_