Remove use of <iostream> where unnecessary.

media/tools/wav_ola_test/wav_ola_test.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.
 
 // This application is a test for AudioRendererAlgorithmOLA. It reads in a
 // specified wav file (so far only 8, 16 and 32 bit are supported) and uses
 // ARAO to scale the playback by a specified rate. Then it outputs the result
 // to the specified location. Command line calls should be as follows:
 //
 //    wav_ola_test RATE INFILE OUTFILE
 
-#include <iostream>
+#include <ostream>
 #include <string>
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "media/base/data_buffer.h"
@@ skipping 143 matching lines @@
   wav.subchunk1_size = 16;
   wav.subchunk2_size = bytes_written;
   fseek(output.get(), 0, SEEK_SET);
   if (fwrite(&wav, sizeof(wav), 1, output.get()) < 1) {
     LOG(ERROR) << "could not write wav header.";
     return 1;
   }
   CommandLine::Reset();
   return 0;
 }