Template methods on Timer classes instead of the classes themselves.

ui/message_center/popup_timer.cc

 // Copyright (c) 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 "ui/message_center/popup_timer.h"
 
 #include <algorithm>
 
 #include "ui/message_center/message_center_style.h"
 #include "ui/message_center/message_center_types.h"
@@ skipping 17 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // PopupTimer
 
 PopupTimer::PopupTimer(const std::string& id,
                        base::TimeDelta timeout,
                        base::WeakPtr<PopupTimersController> controller)
     : id_(id),
       timeout_(timeout),
       timer_controller_(controller),
-      timer_(new base::OneShotTimer<PopupTimersController>) {}
+      timer_(new base::OneShotTimer) {}
 
 PopupTimer::~PopupTimer() {
   if (!timer_)
     return;
 
   if (timer_->IsRunning())
     timer_->Stop();
 }
 
 void PopupTimer::Start() {
@@ skipping 118 matching lines @@
   if (popup_timers_.find(id) == popup_timers_.end())
     StartTimer(id, GetTimeoutForPriority((*iter)->priority()));
 }
 
 void PopupTimersController::OnNotificationRemoved(const std::string& id,
                                                   bool by_user) {
   CancelTimer(id);
 }
 
 }  // namespace message_center