Refactor Timer classes in preparation for landing FrameTimers.

third_party/WebKit/Source/core/frame/SuspendableTimer.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 16 matching lines @@
 #include "core/frame/SuspendableTimer.h"
 
 namespace blink {
 
 namespace {
 // The lowest value returned by TimerBase::nextUnalignedFireInterval is 0.0
 const double kNextFireIntervalInvalid = -1.0;
 }
 
 SuspendableTimer::SuspendableTimer(ExecutionContext* context)
-    : ActiveDOMObject(context)
+    : TimerBase(TimerBase::getTimerTaskRunner())
+    , ActiveDOMObject(context)
     , m_nextFireInterval(kNextFireIntervalInvalid)
     , m_repeatInterval(0)
 #if ENABLE(ASSERT)
     , m_suspended(false)
 #endif
 {
 }
 
 SuspendableTimer::~SuspendableTimer()
 {
@@ skipping 27 matching lines @@
 #endif
     if (m_nextFireInterval >= 0.0) {
         // start() was called before, therefore location() is already set.
         // m_nextFireInterval is only set in suspend() if the Timer was active.
         start(m_nextFireInterval, m_repeatInterval, location());
         m_nextFireInterval = kNextFireIntervalInvalid;
     }
 }
 
 } // namespace blink