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

cc/resources/texture_mailbox.cc

 // Copyright 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/resources/texture_mailbox.h"
 
 #include "base/logging.h"
 #include "third_party/khronos/GLES2/gl2.h"
 
 namespace cc {
@@ skipping 32 matching lines @@
 TextureMailbox::TextureMailbox(const gpu::Mailbox& mailbox_name,
                                unsigned texture_target,
                                unsigned sync_point)
     : target_(texture_target),
       sync_point_(sync_point),
       shared_memory_(NULL) {
   name_.SetName(mailbox_name.name);
 }
 
 TextureMailbox::TextureMailbox(base::SharedMemory* shared_memory,
-                               gfx::Size size)
+                               const gfx::Size& size)
     : target_(GL_TEXTURE_2D),
       sync_point_(0),
       shared_memory_(shared_memory),
       shared_memory_size_(size) {}
 
 TextureMailbox::~TextureMailbox() {}
 
 bool TextureMailbox::Equals(const TextureMailbox& other) const {
   if (other.IsTexture())
     return ContainsMailbox(other.name());
@@ skipping 15 matching lines @@
 void TextureMailbox::SetName(const gpu::Mailbox& name) {
   DCHECK(shared_memory_ == NULL);
   name_ = name;
 }
 
 size_t TextureMailbox::shared_memory_size_in_bytes() const {
   return 4 * shared_memory_size_.GetArea();
 }
 
 }  // namespace cc