Switch to standard integer types in ppapi/.

ppapi/tests/test_media_stream_audio_track.h

 // Copyright 2014 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.
 
 #ifndef PPAPI_TESTS_TEST_MEDIA_STREAM_AUDIO_TRACK_H_
 #define PPAPI_TESTS_TEST_MEDIA_STREAM_AUDIO_TRACK_H_
 
+#include <stdint.h>
+
 #include <string>
 
 #include "ppapi/cpp/media_stream_audio_track.h"
 #include "ppapi/cpp/video_frame.h"
 #include "ppapi/tests/test_case.h"
 
 class TestMediaStreamAudioTrack : public TestCase {
  public:
   explicit TestMediaStreamAudioTrack(TestingInstance* instance);
   virtual ~TestMediaStreamAudioTrack();
@@ skipping 15 matching lines @@
   std::string TestConfigure();
   std::string TestConfigureClose();
   std::string TestVerifyWaveform();
 
   pp::MediaStreamAudioTrack audio_track_;
 
   NestedEvent event_;
 };
 
 #endif  // PPAPI_TESTS_TEST_MEDIA_STREAM_AUDIO_TRACK_H_