Refactor TimeBase to post tasks. Workers to use real Idle tasks.

Source/platform/scheduler/Scheduler.cpp

 // 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.
 
 #include "config.h"
 #include "platform/scheduler/Scheduler.h"
 
 #include "public/platform/Platform.h"
 #include "public/platform/WebScheduler.h"
 #include "public/platform/WebTraceLocation.h"
+#include "wtf/MainThread.h"
 
 namespace blink {
 
 class IdleTaskRunner : public WebThread::IdleTask {
     WTF_MAKE_NONCOPYABLE(IdleTaskRunner);
 
 public:
     explicit IdleTaskRunner(PassOwnPtr<Scheduler::IdleTask> task)
         : m_task(task)
     {
@@ skipping 58 matching lines @@
     if (m_webScheduler)
         m_webScheduler->postIdleTaskAfterWakeup(location, new IdleTaskRunner(idleTask));
 }
 
 void Scheduler::postLoadingTask(const WebTraceLocation& location, WebThread::Task* task)
 {
     if (m_webScheduler)
         m_webScheduler->postLoadingTask(location, task);
 }
 
+void Scheduler::postTimerTask(const WebTraceLocation& location, WebThread::Task* task, long long delayMs)
+{
+    ASSERT(WTF::isMainThread());
+
+    if (m_webScheduler)
+        m_webScheduler->postTimerTask(location, task, delayMs);
+}
+
 bool Scheduler::shouldYieldForHighPriorityWork() const
 {
     if (m_webScheduler)
         return m_webScheduler->shouldYieldForHighPriorityWork();
     return false;
 }
 
 bool Scheduler::canExceedIdleDeadlineIfRequired() const
 {
     if (m_webScheduler)
         return m_webScheduler->canExceedIdleDeadlineIfRequired();
     return false;
 }
 
 } // namespace blink