Convert Filter::Seek() to use new callback system.

content/renderer/media/audio_renderer_impl.cc

 // Copyright (c) 2011 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/media/audio_renderer_impl.h"
 
 #include <math.h>
 
 #include "content/common/audio_messages.h"
 #include "content/renderer/render_thread.h"
@@ skipping 114 matching lines @@
   AudioRendererBase::Pause(callback);
   base::AutoLock auto_lock(lock_);
   if (stopped_)
     return;
 
   io_loop_->PostTask(FROM_HERE,
       NewRunnableMethod(this, &AudioRendererImpl::PauseTask));
 }
 
 void AudioRendererImpl::Seek(base::TimeDelta time,
-                             media::FilterCallback* callback) {
-  AudioRendererBase::Seek(time, callback);
+                             const media::FilterStatusCB& cb) {
+  AudioRendererBase::Seek(time, cb);
   base::AutoLock auto_lock(lock_);
   if (stopped_)
     return;
 
   io_loop_->PostTask(FROM_HERE,
       NewRunnableMethod(this, &AudioRendererImpl::SeekTask));
 }
 
 
 void AudioRendererImpl::Play(media::FilterCallback* callback) {
@@ skipping 192 matching lines @@
   DCHECK(MessageLoop::current() == io_loop_);
 
   // We treat the IO loop going away the same as stopping.
   base::AutoLock auto_lock(lock_);
   if (stopped_)
     return;
 
   stopped_ = true;
   DestroyTask();
 }