[#7] Pass gfx structs by const ref (gfx::Size)

content/renderer/gpu/compositor_software_output_device.h

 // Copyright (c) 2013 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_RENDERER_GPU_COMPOSITOR_SOFTWARE_OUTPUT_DEVICE_H_
 #define CONTENT_RENDERER_GPU_COMPOSITOR_SOFTWARE_OUTPUT_DEVICE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/shared_memory.h"
 #include "base/threading/non_thread_safe.h"
 #include "cc/output/software_output_device.h"
 #include "content/public/renderer/render_thread.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 class SkRegion;
 
 namespace content {
 
 // This class can be created only on the main thread, but then becomes pinned
 // to a fixed thread when BindToClient is called.
 class CompositorSoftwareOutputDevice
     : NON_EXPORTED_BASE(public cc::SoftwareOutputDevice),
       NON_EXPORTED_BASE(public base::NonThreadSafe) {
 public:
   CompositorSoftwareOutputDevice();
   virtual ~CompositorSoftwareOutputDevice();
 
-  virtual void Resize(gfx::Size size) OVERRIDE;
+  virtual void Resize(const gfx::Size& size) OVERRIDE;
 
   virtual SkCanvas* BeginPaint(const gfx::Rect& damage_rect) OVERRIDE;
   virtual void EndPaint(cc::SoftwareFrameData* frame_data) OVERRIDE;
   virtual void EnsureBackbuffer() OVERRIDE;
   virtual void DiscardBackbuffer() OVERRIDE;
 
   virtual void ReclaimSoftwareFrame(unsigned id) OVERRIDE;
 
 private:
   // Internal buffer class that manages shared memory lifetime and ownership.
@@ skipping 49 matching lines @@
   unsigned next_buffer_id_;
   ScopedVector<Buffer> buffers_;
   ScopedVector<Buffer> awaiting_ack_;
   SkBitmap bitmap_;
   RenderThread* render_thread_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GPU_COMPOSITOR_SOFTWARE_OUTPUT_DEVICE_H_