Replace size_t with int in a few media classes.

media/audio/win/audio_low_latency_input_win_unittest.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 <windows.h>
 #include <mmsystem.h>
 
 #include "base/basictypes.h"
 #include "base/environment.h"
 #include "base/file_util.h"
@@ skipping 47 matching lines @@
     binary_file_ = file_util::OpenFile(file_path, "wb");
     DLOG_IF(ERROR, !binary_file_) << "Failed to open binary PCM data file.";
     LOG(INFO) << ">> Output file: " << file_path.value()
               << " has been created.";
   }
 
   virtual ~WriteToFileAudioSink() {
     size_t bytes_written = 0;
     while (bytes_written < bytes_to_write_) {
       const uint8* chunk;
-      size_t chunk_size;
+      int chunk_size;
 
       // Stop writing if no more data is available.
       if (!buffer_.GetCurrentChunk(&chunk, &chunk_size))
         break;
 
       // Write recorded data chunk to the file and prepare for next chunk.
       fwrite(chunk, 1, chunk_size, binary_file_);
       buffer_.Seek(chunk_size);
       bytes_written += chunk_size;
     }
@@ skipping 304 matching lines @@
 
   LOG(INFO) << ">> Sample rate: " << aisw.sample_rate() << " [Hz]";
   WriteToFileAudioSink file_sink(file_name);
   LOG(INFO) << ">> Speak into the default microphone while recording.";
   ais->Start(&file_sink);
   base::PlatformThread::Sleep(TestTimeouts::action_timeout_ms());
   ais->Stop();
   LOG(INFO) << ">> Recording has stopped.";
   ais->Close();
 }