Use a direct include of strings headers in ipc/, jingle/, media/.

media/tools/demuxer_bench/demuxer_bench.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.
 //
 // demuxer_bench is a standalone benchmarking tool for FFmpegDemuxer. It
 // simulates the reading requirements for playback by reading from the stream
 // that has the earliest timestamp.
 
 #include <iostream>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
-#include "base/string_number_conversions.h"
+#include "base/strings/string_number_conversions.h"
 #include "media/base/media.h"
 #include "media/filters/ffmpeg_demuxer.h"
 #include "media/filters/file_data_source.h"
 
 namespace switches {
 const char kEnableBitstreamConverter[] = "enable-bitstream-converter";
 }  // namespace switches
 
 class DemuxerHostImpl : public media::DemuxerHost {
  public:
@@ skipping 201 matching lines @@
     std::cout << ", " << stream_reader.counts()[i] << " packets" << std::endl;
   }
 
   // Teardown.
   demuxer.Stop(base::Bind(
       &QuitLoopWithStatus, &message_loop, media::PIPELINE_OK));
   message_loop.Run();
 
   return 0;
 }