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

cc/output/output_surface.cc

 // 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.
 
 #include "cc/output/output_surface.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 337 matching lines @@
     software_device_->EnsureBackbuffer();
 }
 
 void OutputSurface::DiscardBackbuffer() {
   if (context_provider_)
     context_provider_->ContextGL()->DiscardBackbufferCHROMIUM();
   if (software_device_)
     software_device_->DiscardBackbuffer();
 }
 
-void OutputSurface::Reshape(gfx::Size size, float scale_factor) {
+void OutputSurface::Reshape(const gfx::Size& size, float scale_factor) {
   if (size == surface_size_ && scale_factor == device_scale_factor_)
     return;
 
   surface_size_ = size;
   device_scale_factor_ = scale_factor;
   if (context_provider_) {
     context_provider_->ContextGL()->ResizeCHROMIUM(
         size.width(), size.height(), scale_factor);
   }
   if (software_device_)
@@ skipping 114 matching lines @@
   TRACE_EVENT1("cc", "OutputSurface::SetMemoryPolicy",
                "bytes_limit_when_visible", policy.bytes_limit_when_visible);
   // Just ignore the memory manager when it says to set the limit to zero
   // bytes. This will happen when the memory manager thinks that the renderer
   // is not visible (which the renderer knows better).
   if (policy.bytes_limit_when_visible)
     client_->SetMemoryPolicy(policy);
 }
 
 }  // namespace cc