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

cc/test/render_pass_test_utils.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/test/render_pass_test_utils.h"
 
 #include "cc/layers/append_quads_data.h"
 #include "cc/layers/quad_sink.h"
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/quads/shared_quad_state.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/test/mock_quad_culler.h"
 #include "cc/test/render_pass_test_common.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkImageFilter.h"
 #include "ui/gfx/rect.h"
 
 namespace cc {
 
 TestRenderPass* AddRenderPass(RenderPassList* pass_list,
                               RenderPass::Id id,
-                              gfx::Rect output_rect,
+                              const gfx::Rect& output_rect,
                               const gfx::Transform& root_transform) {
   scoped_ptr<TestRenderPass> pass(TestRenderPass::Create());
   pass->SetNew(id, output_rect, output_rect, root_transform);
   TestRenderPass* saved = pass.get();
   pass_list->push_back(pass.PassAs<RenderPass>());
   return saved;
 }
 
 SolidColorDrawQuad* AddQuad(TestRenderPass* pass,
-                            gfx::Rect rect,
+                            const gfx::Rect& rect,
                             SkColor color) {
   MockQuadCuller quad_sink(&pass->quad_list, &pass->shared_quad_state_list);
   AppendQuadsData data(pass->id);
   SharedQuadState* shared_state =
       quad_sink.UseSharedQuadState(SharedQuadState::Create());
   shared_state->SetAll(gfx::Transform(),
                        rect.size(),
                        rect,
                        rect,
                        false,
                        1,
                        SkXfermode::kSrcOver_Mode);
   scoped_ptr<SolidColorDrawQuad> quad = SolidColorDrawQuad::Create();
   quad->SetNew(shared_state, rect, color, false);
   SolidColorDrawQuad* quad_ptr = quad.get();
   quad_sink.Append(quad.PassAs<DrawQuad>(), &data);
   return quad_ptr;
 }
 
 SolidColorDrawQuad* AddClippedQuad(TestRenderPass* pass,
-                                   gfx::Rect rect,
+                                   const gfx::Rect& rect,
                                    SkColor color) {
   MockQuadCuller quad_sink(&pass->quad_list, &pass->shared_quad_state_list);
   AppendQuadsData data(pass->id);
   SharedQuadState* shared_state =
       quad_sink.UseSharedQuadState(SharedQuadState::Create());
   shared_state->SetAll(gfx::Transform(),
                        rect.size(),
                        rect,
                        rect,
                        true,
                        1,
                        SkXfermode::kSrcOver_Mode);
   scoped_ptr<SolidColorDrawQuad> quad = SolidColorDrawQuad::Create();
   quad->SetNew(shared_state, rect, color, false);
   SolidColorDrawQuad* quad_ptr = quad.get();
   quad_sink.Append(quad.PassAs<DrawQuad>(), &data);
   return quad_ptr;
 }
 
 SolidColorDrawQuad* AddTransformedQuad(TestRenderPass* pass,
-                                       gfx::Rect rect,
+                                       const gfx::Rect& rect,
                                        SkColor color,
                                        const gfx::Transform& transform) {
   MockQuadCuller quad_sink(&pass->quad_list, &pass->shared_quad_state_list);
   AppendQuadsData data(pass->id);
   SharedQuadState* shared_state =
       quad_sink.UseSharedQuadState(SharedQuadState::Create());
   shared_state->SetAll(
       transform, rect.size(), rect, rect, false, 1, SkXfermode::kSrcOver_Mode);
   scoped_ptr<SolidColorDrawQuad> quad = SolidColorDrawQuad::Create();
   quad->SetNew(shared_state, rect, color, false);
@@ skipping 43 matching lines @@
                        1,
                        SkXfermode::kSrcOver_Mode);
   scoped_ptr<RenderPassDrawQuad> quad = RenderPassDrawQuad::Create();
   quad->SetNew(shared_state, output_rect, contributing_pass->id, false,
                mask_resource_id, output_rect, gfx::RectF(), filters,
                FilterOperations());
   quad_sink.Append(quad.PassAs<DrawQuad>(), &data);
 }
 
 }  // namespace cc