[Reland] Per WebViewScheduler virtual time

components/scheduler/child/webthread_base.h

 // 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.
 
 #ifndef COMPONENTS_SCHEDULER_CHILD_WEBTHREAD_BASE_H_
 #define COMPONENTS_SCHEDULER_CHILD_WEBTHREAD_BASE_H_
 
 #include <map>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 16 matching lines @@
   bool isCurrentThread() const override;
   blink::PlatformThreadId threadId() const override = 0;
 
   virtual void postIdleTask(const blink::WebTraceLocation& location,
                             IdleTask* idle_task);
   virtual void postIdleTaskAfterWakeup(const blink::WebTraceLocation& location,
                                        IdleTask* idle_task);
 
   void addTaskObserver(TaskObserver* observer) override;
   void removeTaskObserver(TaskObserver* observer) override;
+  double virtualTimeSeconds() override;
+  double monotonicallyIncreasingVirtualTimeSeconds() override;
 
   // Returns the base::Bind-compatible task runner for posting tasks to this
   // thread. Can be called from any thread.
   virtual base::SingleThreadTaskRunner* TaskRunner() const = 0;
 
   // Returns the base::Bind-compatible task runner for posting idle tasks to
   // this thread. Can be called from any thread.
   virtual scheduler::SingleThreadIdleTaskRunner* IdleTaskRunner() const = 0;
 
  protected:
@@ skipping 11 matching lines @@
       base::TimeTicks deadline);
 
  private:
   typedef std::map<TaskObserver*, TaskObserverAdapter*> TaskObserverMap;
   TaskObserverMap task_observer_map_;
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_CHILD_WEBTHREAD_BASE_H_