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

cc/resources/prioritized_resource.cc

 // 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.
 
 #include "cc/resources/prioritized_resource.h"
 
 #include <algorithm>
 
 #include "cc/resources/platform_color.h"
 #include "cc/resources/prioritized_resource_manager.h"
 #include "cc/resources/priority_calculator.h"
 #include "cc/trees/proxy.h"
 
 namespace cc {
 
 PrioritizedResource::PrioritizedResource(PrioritizedResourceManager* manager,
-                                         gfx::Size size,
+                                         const gfx::Size& size,
                                          ResourceFormat format)
     : size_(size),
       format_(format),
       bytes_(0),
       contents_swizzled_(false),
       priority_(PriorityCalculator::LowestPriority()),
       is_above_priority_cutoff_(false),
       is_self_managed_(false),
       backing_(NULL),
       manager_(NULL) {
@@ skipping 10 matching lines @@
 void PrioritizedResource::SetTextureManager(
     PrioritizedResourceManager* manager) {
   if (manager_ == manager)
     return;
   if (manager_)
     manager_->UnregisterTexture(this);
   if (manager)
     manager->RegisterTexture(this);
 }
 
-void PrioritizedResource::SetDimensions(gfx::Size size, ResourceFormat format) {
+void PrioritizedResource::SetDimensions(const gfx::Size& size,
+                                        ResourceFormat format) {
   if (format_ != format || size_ != size) {
     is_above_priority_cutoff_ = false;
     format_ = format;
     size_ = size;
     bytes_ = Resource::MemorySizeBytes(size, format);
     DCHECK(manager_ || !backing_);
     if (manager_)
       manager_->ReturnBackingTexture(this);
   }
 }
@@ skipping 51 matching lines @@
 }
 
 void PrioritizedResource::SetToSelfManagedMemoryPlaceholder(size_t bytes) {
   SetDimensions(gfx::Size(), RGBA_8888);
   set_is_self_managed(true);
   bytes_ = bytes;
 }
 
 PrioritizedResource::Backing::Backing(unsigned id,
                                       ResourceProvider* resource_provider,
-                                      gfx::Size size,
+                                      const gfx::Size& size,
                                       ResourceFormat format)
     : Resource(id, size, format),
       owner_(NULL),
       priority_at_last_priority_update_(PriorityCalculator::LowestPriority()),
       was_above_priority_cutoff_at_last_priority_update_(false),
       in_drawing_impl_tree_(false),
       in_parent_compositor_(false),
 #ifdef NDEBUG
       resource_has_been_deleted_(false) {}
 #else
@@ skipping 61 matching lines @@
     manager_->ReturnBackingTexture(this);
 }
 
 const Proxy* PrioritizedResource::Backing::proxy() const {
   if (!owner_ || !owner_->resource_manager())
     return NULL;
   return owner_->resource_manager()->ProxyForDebug();
 }
 
 }  // namespace cc