[#2] Pass gfx structs by const ref (gfx::Rect, gfx::RectF)

cc/layers/delegated_frame_provider_unittest.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/layers/delegated_frame_provider.h"
 #include "cc/layers/delegated_frame_resource_collection.h"
 #include "cc/layers/delegated_renderer_layer.h"
 #include "cc/output/delegated_frame_data.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/resources/returned_resource.h"
 #include "cc/resources/transferable_resource.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 namespace {
 
 class DelegatedFrameProviderTest
     : public testing::Test,
       public DelegatedFrameResourceCollectionClient {
  protected:
   DelegatedFrameProviderTest() : resources_available_(false) {}
 
-  scoped_ptr<DelegatedFrameData> CreateFrameData(gfx::Rect root_output_rect,
-                                                 gfx::Rect root_damage_rect) {
+  scoped_ptr<DelegatedFrameData> CreateFrameData(
+          const gfx::Rect& root_output_rect,
+          const gfx::Rect& root_damage_rect) {
     scoped_ptr<DelegatedFrameData> frame(new DelegatedFrameData);
 
     scoped_ptr<RenderPass> root_pass(RenderPass::Create());
     root_pass->SetNew(RenderPass::Id(1, 1),
                       root_output_rect,
                       root_damage_rect,
                       gfx::Transform());
     frame->render_pass_list.push_back(root_pass.Pass());
     return frame.Pass();
   }
@@ skipping 351 matching lines @@
 
   frame_provider_ = NULL;
 
   // Nothing is returned twice.
   EXPECT_FALSE(ReturnAndResetResourcesAvailable());
   EXPECT_EQ(0u, resources_.size());
 }
 
 }  // namespace
 }  // namespace cc