Optimize posting of WTF::Closure and improve scheduler test mocks

third_party/WebKit/Source/platform/scheduler/child/web_task_runner_impl.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 "platform/scheduler/child/web_task_runner_impl.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "public/platform/scheduler/base/task_queue.h"
@@ skipping 44 matching lines @@
   // TimeDomain.  If that happens just return the current real time.
   if (!time_domain)
     return base::TimeTicks::Now();
   return time_domain->Now();
 }
 
 std::unique_ptr<blink::WebTaskRunner> WebTaskRunnerImpl::clone() {
   return base::WrapUnique(new WebTaskRunnerImpl(task_queue_));
 }
 
-base::SingleThreadTaskRunner* WebTaskRunnerImpl::taskRunner() {
+base::SingleThreadTaskRunner* WebTaskRunnerImpl::toSingleThreadTaskRunner() {
   return task_queue_.get();
 }
 
 void WebTaskRunnerImpl::runTask(
     std::unique_ptr<blink::WebTaskRunner::Task> task) {
   task->run();
 }
 
 }  // namespace scheduler
 }  // namespace blink