cc: Fix const value pattern by replacing it by non-const or reference.

cc/layers/scrollbar_layer_unittest.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 <stddef.h>
 
 #include <unordered_map>
 
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 1011 matching lines @@
   EXPECT_EQ(expected_created,
             fake_ui_resource_manager_->TotalUIResourceCreated());
   EXPECT_EQ(expected_deleted,
             fake_ui_resource_manager_->TotalUIResourceDeleted());
 
   testing::Mock::VerifyAndClearExpectations(layer_tree_host_.get());
 }
 
 class ScaledScrollbarLayerTestResourceCreation : public ScrollbarLayerTest {
  public:
-  void TestResourceUpload(const float test_scale) {
+  void TestResourceUpload(float test_scale) {
     gfx::Point scrollbar_location(0, 185);
     scoped_refptr<Layer> layer_tree_root = Layer::Create();
     scoped_refptr<Layer> content_layer = Layer::Create();
     scoped_refptr<FakePaintedScrollbarLayer> scrollbar_layer =
         FakePaintedScrollbarLayer::Create(false, true, layer_tree_root->id());
 
     layer_tree_root->AddChild(content_layer);
     layer_tree_root->AddChild(scrollbar_layer);
 
     layer_tree_host_->SetRootLayer(layer_tree_root);
@@ skipping 48 matching lines @@
   context->UnboundTestContext3d()->set_max_texture_size(512);
   context->BindToCurrentThread();
   int max_texture_size = 0;
   context->ContextGL()->GetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
   EXPECT_EQ(512, max_texture_size);
   TestResourceUpload(max_texture_size / 9.9f);
 }
 
 class ScaledScrollbarLayerTestScaledRasterization : public ScrollbarLayerTest {
  public:
-  void TestScale(const gfx::Rect scrollbar_rect, const float test_scale) {
+  void TestScale(const gfx::Rect& scrollbar_rect, float test_scale) {
     bool paint_during_update = true;
     bool has_thumb = false;
     scoped_refptr<Layer> layer_tree_root = Layer::Create();
     scoped_refptr<FakePaintedScrollbarLayer> scrollbar_layer =
         FakePaintedScrollbarLayer::Create(paint_during_update, has_thumb,
                                           layer_tree_root->id());
 
     layer_tree_root->AddChild(scrollbar_layer);
 
     layer_tree_host_->SetRootLayer(layer_tree_root);
@@ skipping 56 matching lines @@
   TestScale(gfx::Rect(1240, 0, 15, 1333), 2.7754839f);
   TestScale(gfx::Rect(1240, 0, 15, 677), 2.46677136f);
 
   // Horizontal Scrollbars.
   TestScale(gfx::Rect(0, 1240, 1333, 15), 2.7754839f);
   TestScale(gfx::Rect(0, 1240, 677, 15), 2.46677136f);
 }
 
 }  // namespace
 }  // namespace cc