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

cc/resources/prioritized_resource_manager.h

 // 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.
 
 #ifndef CC_RESOURCES_PRIORITIZED_RESOURCE_MANAGER_H_
 #define CC_RESOURCES_PRIORITIZED_RESOURCE_MANAGER_H_
 
 #include <list>
 #include <vector>
 
@@ skipping 22 matching lines @@
 
 class PriorityCalculator;
 class Proxy;
 
 class CC_EXPORT PrioritizedResourceManager {
  public:
   static scoped_ptr<PrioritizedResourceManager> Create(const Proxy* proxy) {
     return make_scoped_ptr(new PrioritizedResourceManager(proxy));
   }
   scoped_ptr<PrioritizedResource> CreateTexture(
-      const gfx::Size& size, ResourceFormat format) {
+      gfx::Size size, ResourceFormat format) {
     return make_scoped_ptr(new PrioritizedResource(this, size, format));
   }
   ~PrioritizedResourceManager();
 
   typedef std::list<PrioritizedResource::Backing*> BackingList;
 
   // TODO(epenner): (http://crbug.com/137094) This 64MB default is a straggler
   // from the old texture manager and is just to give us a default memory
   // allocation before we get a callback from the GPU memory manager. We
   // should probaby either:
@@ skipping 128 matching lines @@
   }
 
   explicit PrioritizedResourceManager(const Proxy* proxy);
 
   bool EvictBackingsToReduceMemory(size_t limit_bytes,
                                    int priority_cutoff,
                                    EvictionPolicy eviction_policy,
                                    UnlinkPolicy unlink_policy,
                                    ResourceProvider* resource_provider);
   PrioritizedResource::Backing* CreateBacking(
-      const gfx::Size& size,
+      gfx::Size size,
       ResourceFormat format,
       ResourceProvider* resource_provider);
   void EvictFirstBackingResource(ResourceProvider* resource_provider);
   void SortBackings();
 
   void AssertInvariants();
 
   size_t max_memory_limit_bytes_;
   // The priority cutoff based on memory pressure. This is not a strict
   // cutoff -- RequestLate allows textures with priority equal to this
@@ skipping 35 matching lines @@
   // Statistics copied at the time of PushTexturePrioritiesToBackings.
   size_t memory_visible_last_pushed_bytes_;
   size_t memory_visible_and_nearby_last_pushed_bytes_;
 
   DISALLOW_COPY_AND_ASSIGN(PrioritizedResourceManager);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PRIORITIZED_RESOURCE_MANAGER_H_