Move throttling of background timers into the renderer scheduler

components/scheduler/base/real_time_domain.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 "components/scheduler/base/real_time_domain.h"
 
 #include "base/bind.h"
 #include "components/scheduler/base/task_queue_impl.h"
 #include "components/scheduler/base/task_queue_manager_delegate.h"
 
 namespace scheduler {
 
-RealTimeDomain::RealTimeDomain() : weak_factory_(this) {}
+RealTimeDomain::RealTimeDomain() : TimeDomain(nullptr), weak_factory_(this) {}
 
 RealTimeDomain::~RealTimeDomain() {}
 
 void RealTimeDomain::OnRegisterWithTaskQueueManager(
     TaskQueueManagerDelegate* task_queue_manager_delegate,
     base::Closure do_work_closure) {
   task_queue_manager_delegate_ = task_queue_manager_delegate;
   do_work_closure_ = do_work_closure;
   DCHECK(task_queue_manager_delegate_);
 }
@@ skipping 40 matching lines @@
 }
 
 void RealTimeDomain::AsValueIntoInternal(
     base::trace_event::TracedValue* state) const {}
 
 const char* RealTimeDomain::GetName() const {
   return "RealTimeDomain";
 }
 
 }  // namespace scheduler