Remove task.h and finish base::Bind() migration.

remoting/protocol/rtp_video_writer.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 "remoting/protocol/rtp_video_writer.h"
 
 #include "base/bind.h"
-#include "base/task.h"
+#include "base/callback.h"
 #include "net/base/io_buffer.h"
 #include "remoting/base/compound_buffer.h"
 #include "remoting/base/constants.h"
 #include "remoting/proto/video.pb.h"
 #include "remoting/protocol/rtp_writer.h"
 #include "remoting/protocol/session.h"
 
 namespace remoting {
 namespace protocol {
 
@@ skipping 123 matching lines @@
 
   done.Run();
 }
 
 int RtpVideoWriter::GetPendingPackets() {
   return rtp_writer_.GetPendingPackets();
 }
 
 }  // namespace protocol
 }  // namespace remoting