Don't peek messages in the MessagePumpForUI class when we receive our kMsgHaveWork message.

base/message_loop/incoming_task_queue.cc

 // Copyright 2013 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 "base/message_loop/incoming_task_queue.h"
 
 #include <limits>
 
 #include "base/location.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 101 matching lines @@
 
 void IncomingTaskQueue::StartScheduling() {
   AutoLock lock(incoming_queue_lock_);
   DCHECK(!is_ready_for_scheduling_);
   DCHECK(!message_loop_scheduled_);
   is_ready_for_scheduling_ = true;
   if (!incoming_queue_.empty())
     ScheduleWork();
 }
 
+TimeTicks IncomingTaskQueue::GetNewlyAddedTaskDelay() {
+  return !incoming_queue_.empty() ? incoming_queue_.front().delayed_run_time :
+      TimeTicks();
+}
+
 IncomingTaskQueue::~IncomingTaskQueue() {
   // Verify that WillDestroyCurrentMessageLoop() has been called.
   DCHECK(!message_loop_);
 }
 
 TimeTicks IncomingTaskQueue::CalculateDelayedRuntime(TimeDelta delay) {
   TimeTicks delayed_run_time;
   if (delay > TimeDelta())
     delayed_run_time = TimeTicks::Now() + delay;
   else
@@ skipping 41 matching lines @@
   // After we've scheduled the message loop, we do not need to do so again
   // until we know it has processed all of the work in our queue and is
   // waiting for more work again. The message loop will always attempt to
   // reload from the incoming queue before waiting again so we clear this flag
   // in ReloadWorkQueue().
   message_loop_scheduled_ = true;
 }
 
 }  // namespace internal
 }  // namespace base