cc: Get rid of non-delegated rendering in most cc unit tests.

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/threading/thread_task_runner_handle.h"
 #include "cc/animation/animation_host.h"
@@ skipping 81 matching lines @@
       std::unordered_map<UIResourceId, UIResourceBitmap>;
   UIResourceBitmapMap ui_resource_bitmap_map_;
 
   int next_id_;
   int total_ui_resource_created_;
   int total_ui_resource_deleted_;
 };
 
 class ScrollbarLayerTest : public testing::Test {
  public:
-  ScrollbarLayerTest() : fake_client_(FakeLayerTreeHostClient::DIRECT_3D) {
+  ScrollbarLayerTest() {
     layer_tree_settings_.single_thread_proxy_scheduler = false;
     layer_tree_settings_.use_zero_copy = true;
     layer_tree_settings_.scrollbar_animator = LayerTreeSettings::LINEAR_FADE;
     layer_tree_settings_.scrollbar_fade_delay_ms = 20;
     layer_tree_settings_.scrollbar_fade_duration_ms = 20;
 
     scrollbar_layer_id_ = -1;
 
     LayerTreeHost::InitParams params;
     params.client = &fake_client_;
@@ skipping 1035 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