cc: Split Proxy and TaskRunnerProvider for the LayerTreeHost

cc/trees/threaded_channel.cc

 // Copyright 2015 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/threaded_channel.h"
 
 #include "base/bind.h"
 #include "base/single_thread_task_runner.h"
 #include "base/trace_event/trace_event.h"
 
 namespace cc {
 
 scoped_ptr<ThreadedChannel> ThreadedChannel::Create(
     ThreadProxy* thread_proxy,
-    scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner) {
+    TaskRunnerProvider* task_runner_provider) {
   return make_scoped_ptr(
-      new ThreadedChannel(thread_proxy, main_task_runner, impl_task_runner));
+      new ThreadedChannel(thread_proxy, task_runner_provider));
 }
 
-ThreadedChannel::ThreadedChannel(
-    ThreadProxy* thread_proxy,
-    scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner)
+ThreadedChannel::ThreadedChannel(ThreadProxy* thread_proxy,
+                                 TaskRunnerProvider* task_runner_provider)
     : proxy_main_(thread_proxy),
       proxy_impl_(thread_proxy),
-      proxy_(thread_proxy),
-      main_task_runner_(main_task_runner),
-      impl_task_runner_(impl_task_runner) {}
+      task_runner_provider_(task_runner_provider) {}
 
 void ThreadedChannel::SetThrottleFrameProductionOnImpl(bool throttle) {
   ImplThreadTaskRunner()->PostTask(
       FROM_HERE, base::Bind(&ProxyImpl::SetThrottleFrameProductionOnImpl,
                             proxy_impl_->GetImplWeakPtr(), throttle));
 }
 
 void ThreadedChannel::UpdateTopControlsStateOnImpl(TopControlsState constraints,
                                                    TopControlsState current,
                                                    bool animate) {
@@ skipping 179 matching lines @@
       FROM_HERE,
       base::Bind(&ProxyMain::BeginMainFrame, proxy_main_->GetMainWeakPtr(),
                  base::Passed(&begin_main_frame_state)));
 }
 
 ThreadedChannel::~ThreadedChannel() {
   TRACE_EVENT0("cc", "ThreadChannel::~ThreadChannel");
 }
 
 base::SingleThreadTaskRunner* ThreadedChannel::MainThreadTaskRunner() const {
-  return main_task_runner_.get();
+  return task_runner_provider_->MainThreadTaskRunner();
 }
 
 base::SingleThreadTaskRunner* ThreadedChannel::ImplThreadTaskRunner() const {
-  return impl_task_runner_.get();
+  return task_runner_provider_->ImplThreadTaskRunner();
 }
 
 }  // namespace cc