cc: Break up with FakeLayerTreeHostClient.

cc/trees/layer_tree_host_unittest_scroll.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/trees/layer_tree_host.h"
 
 #include "base/location.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 1333 matching lines @@
 
 void BindInputHandlerOnCompositorThread(
     const base::WeakPtr<InputHandler>& input_handler,
     ThreadCheckingInputHandlerClient* client) {
   input_handler->BindToClient(client);
 }
 
 TEST(LayerTreeHostFlingTest, DidStopFlingingThread) {
   base::Thread impl_thread("cc");
   ASSERT_TRUE(impl_thread.Start());
+  ASSERT_TRUE(impl_thread.task_runner());
 
   bool received_stop_flinging = false;
   LayerTreeSettings settings;
 
-  ThreadCheckingInputHandlerClient input_handler_client(
-      impl_thread.task_runner().get(), &received_stop_flinging);
-  FakeLayerTreeHostClient client;
-
-  ASSERT_TRUE(impl_thread.task_runner());
+  StubLayerTreeHostClient layer_tree_host_client;
   TestSharedBitmapManager shared_bitmap_manager;
   TestTaskGraphRunner task_graph_runner;
 
   LayerTreeHost::InitParams params;
-  params.client = &client;
+  params.client = &layer_tree_host_client;
   params.shared_bitmap_manager = &shared_bitmap_manager;
   params.task_graph_runner = &task_graph_runner;
   params.settings = &settings;
   params.main_task_runner = base::ThreadTaskRunnerHandle::Get();
   params.animation_host = AnimationHost::CreateForTesting(ThreadInstance::MAIN);
   std::unique_ptr<LayerTreeHost> layer_tree_host =
       LayerTreeHost::CreateThreaded(impl_thread.task_runner(), &params);
 
+  ThreadCheckingInputHandlerClient input_handler_client(
+      impl_thread.task_runner().get(), &received_stop_flinging);
   impl_thread.task_runner()->PostTask(
       FROM_HERE, base::Bind(&BindInputHandlerOnCompositorThread,
                             layer_tree_host->GetInputHandler(),
                             base::Unretained(&input_handler_client)));
 
   layer_tree_host->DidStopFlinging();
   layer_tree_host = nullptr;
   impl_thread.Stop();
   EXPECT_TRUE(received_stop_flinging);
 }
@@ skipping 465 matching lines @@
   int num_impl_commits_;
   int num_aborted_commits_;
   int num_impl_scrolls_;
   int num_draws_;
 };
 
 MULTI_THREAD_TEST_F(LayerTreeHostScrollTestScrollAbortedCommitMFBA);
 
 }  // namespace
 }  // namespace cc