content: Use base::MessageLoop.

content/renderer/load_progress_tracker.cc

 // Copyright (c) 2012 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 "content/renderer/load_progress_tracker.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "content/common/view_messages.h"
 #include "content/renderer/render_view_impl.h"
@@ skipping 50 matching lines @@
     weak_factory_.InvalidateWeakPtrs();
     SendChangeLoadProgress();
     if (progress == 1.0)
       ResetStates();
     return;
   }
 
   if (weak_factory_.HasWeakPtrs())
     return;
 
-  MessageLoop::current()->PostDelayedTask(
+  base::MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&LoadProgressTracker::SendChangeLoadProgress,
                  weak_factory_.GetWeakPtr()),
       min_delay);
 }
 
 void LoadProgressTracker::SendChangeLoadProgress() {
   last_time_progress_sent_ = base::TimeTicks::Now();
   render_view_->Send(
       new ViewHostMsg_DidChangeLoadProgress(render_view_->routing_id(),
                                             progress_));
 }
 
 void LoadProgressTracker::ResetStates() {
   tracked_frame_ = NULL;
   progress_ = 0.0;
   weak_factory_.InvalidateWeakPtrs();
   last_time_progress_sent_ = base::TimeTicks();
 }
 
 }  // namespace content