Move and rename TaskTimeTracker to public interface exposed to WebThread, use in WebPerf Agent.

third_party/WebKit/Source/platform/scheduler/child/webthread_base.cc

 // Copyright 2014 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.
 
 // An implementation of WebThread in terms of base::MessageLoop and
 // base::Thread
 
 #include "public/platform/scheduler/child/webthread_base.h"
 
 #include "base/bind.h"
@@ skipping 45 matching lines @@
 void WebThreadBase::removeTaskObserver(TaskObserver* observer) {
   CHECK(isCurrentThread());
   TaskObserverMap::iterator iter = task_observer_map_.find(observer);
   if (iter == task_observer_map_.end())
     return;
   RemoveTaskObserverInternal(iter->second);
   delete iter->second;
   task_observer_map_.erase(iter);
 }
 
+void WebThreadBase::addTaskTimeObserver(TaskTimeObserver* task_time_observer) {
+    AddTaskTimeObserverInternal(task_time_observer);

[alph, 2016/08/22 22:21:27]

nit: something wrong with indentation here.

[panicker, 2016/08/22 23:14:15]

Acknowledged.

+}
+
+void WebThreadBase::removeTaskTimeObserver(TaskTimeObserver* task_time_observer) {
+    RemoveTaskTimeObserverInternal(task_time_observer);
+}
+
 void WebThreadBase::AddTaskObserverInternal(
     base::MessageLoop::TaskObserver* observer) {
   base::MessageLoop::current()->AddTaskObserver(observer);
 }
 
 void WebThreadBase::RemoveTaskObserverInternal(
     base::MessageLoop::TaskObserver* observer) {
   base::MessageLoop::current()->RemoveTaskObserver(observer);
 }
 
@@ skipping 18 matching lines @@
       location, base::Bind(&WebThreadBase::RunWebThreadIdleTask,
                            base::Passed(base::WrapUnique(idle_task))));
 }
 
 bool WebThreadBase::isCurrentThread() const {
   return GetTaskRunner()->BelongsToCurrentThread();
 }
 
 }  // namespace scheduler
 }  // namespace blink