scheduler: Tell the scheduler about frame timing

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 "platform/PlatformThreadData.h"
 #include "platform/Task.h"
 #include "platform/ThreadTimers.h"
@@ skipping 108 matching lines @@
 {
 }
 
 Scheduler::~Scheduler()
 {
     while (hasPendingHighPriorityWork()) {
         swapQueuesAndRunPendingTasks();
     }
 }
 
+void Scheduler::willBeginFrame(const WebBeginFrameArgs& args)
+{
+    // TODO: Use frame deadline and interval to schedule idle tasks.
+}
+
+void Scheduler::didCommitFrameToCompositor()
+{
+    // TODO: Trigger the frame deadline immediately.
+}
+
 void Scheduler::scheduleIdleTask(const TraceLocation& location, const IdleTask& idleTask)
 {
     // TODO: send a real allottedTime here.
     m_mainThread->postTask(new MainThreadIdleTaskAdapter(idleTask, 0, location));
 }
 
 void Scheduler::postTask(const TraceLocation& location, const Task& task)
 {
     m_mainThread->postTask(new MainThreadPendingTaskRunner(task, location));
 }
@@ skipping 119 matching lines @@
 
 void Scheduler::TracedTask::run()
 {
     TRACE_EVENT2("blink", "TracedTask::run",
         "src_file", m_location.fileName(),
         "src_func", m_location.functionName());
     m_task();
 }
 
 } // namespace blink