cc: Clean up LayerTreeTest and TestHooks.

cc/test/threaded_channel_for_test.cc

-// Copyright 2011 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/threaded_channel_for_test.h"
-
-#include "base/memory/ptr_util.h"
-#include "cc/test/proxy_impl_for_test.h"
-
-namespace cc {
-
-std::unique_ptr<ThreadedChannelForTest> ThreadedChannelForTest::Create(
-    TestHooks* test_hooks,
-    ProxyMain* proxy_main,
-    TaskRunnerProvider* task_runner_provider) {
-  return base::WrapUnique(
-      new ThreadedChannelForTest(test_hooks, proxy_main, task_runner_provider));
-}
-
-ThreadedChannelForTest::ThreadedChannelForTest(
-    TestHooks* test_hooks,
-    ProxyMain* proxy_main,
-    TaskRunnerProvider* task_runner_provider)
-    : ThreadedChannel(proxy_main, task_runner_provider),
-      test_hooks_(test_hooks),
-      proxy_impl_for_test_(nullptr) {}
-
-std::unique_ptr<ProxyImpl> ThreadedChannelForTest::CreateProxyImpl(
-    ChannelImpl* channel_impl,
-    LayerTreeHost* layer_tree_host,
-    TaskRunnerProvider* task_runner_provider,
-    std::unique_ptr<BeginFrameSource> external_begin_frame_source) {
-  std::unique_ptr<ProxyImplForTest> proxy_impl = ProxyImplForTest::Create(
-      test_hooks_, channel_impl, layer_tree_host, task_runner_provider,
-      std::move(external_begin_frame_source));
-  proxy_impl_for_test_ = proxy_impl.get();
-  return std::move(proxy_impl);
-}
-
-}  // namespace cc