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

cc/resources/scoped_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/scoped_resource.h"
 
 namespace cc {
 
 ScopedResource::ScopedResource(ResourceProvider* resource_provider)
     : resource_provider_(resource_provider) {
   DCHECK(resource_provider_);
 }
 
 ScopedResource::~ScopedResource() {
   Free();
 }
 
-void ScopedResource::Allocate(const gfx::Size& size,
+void ScopedResource::Allocate(gfx::Size size,
                               ResourceProvider::TextureUsageHint hint,
                               ResourceFormat format) {
   DCHECK(!id());
   DCHECK(!size.IsEmpty());
 
   set_dimensions(size, format);
   set_id(resource_provider_->CreateResource(
       size, GL_CLAMP_TO_EDGE, hint, format));
 
 #ifndef NDEBUG
   allocate_thread_id_ = base::PlatformThread::CurrentId();
 #endif
 }
 
-void ScopedResource::AllocateManaged(const gfx::Size& size,
+void ScopedResource::AllocateManaged(gfx::Size size,
                                      GLenum target,
                                      ResourceFormat format) {
   DCHECK(!id());
   DCHECK(!size.IsEmpty());
 
   set_dimensions(size, format);
   set_id(resource_provider_->CreateManagedResource(
       size,
       target,
       GL_CLAMP_TO_EDGE,
@@ skipping 13 matching lines @@
     resource_provider_->DeleteResource(id());
   }
   set_id(0);
 }
 
 void ScopedResource::Leak() {
   set_id(0);
 }
 
 }  // namespace cc