Small changes such as spacing and adding [in/out] identifiers after @params.

ppapi/cpp/audio.h

 // 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.
 
 #ifndef PPAPI_CPP_AUDIO_H_
 #define PPAPI_CPP_AUDIO_H_
 
 #include "ppapi/c/pp_stdint.h"
 #include "ppapi/c/ppb_audio.h"
 #include "ppapi/cpp/audio_config.h"
@@ skipping 46 matching lines @@
   AudioConfig& config() { return config_; }
 
   /// Getter function for returning the internal <code>PPB_AudioConfig</code>
   /// struct.
   ///
   /// @return A const reference to the internal <code>PPB_AudioConfig</code>
   /// struct.
   const AudioConfig& config() const { return config_; }
 
   /// StartPlayback() starts playback of audio.
+  ///
+  /// @return true if successful, otherwise false.
   bool StartPlayback();
 
   /// StopPlayback stops playback of audio.
+  ///
+  /// @return true if successful, otherwise false.
   bool StopPlayback();
 
  private:
   AudioConfig config_;
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_AUDIO_H_