FilePlayer: Remove unused default values for arguments

webrtc/modules/utility/include/file_player.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 39 matching lines @@
   // Register callback for receiving file playing notifications.
   virtual int32_t RegisterModuleFileCallback(FileCallback* callback) = 0;
 
   // API for playing audio from fileName to channel.
   // Note: codecInst is used for pre-encoded files.
   virtual int32_t StartPlayingFile(const char* fileName,
                                    bool loop,
                                    uint32_t startPosition,
                                    float volumeScaling,
                                    uint32_t notification,
-                                   uint32_t stopPosition = 0,
-                                   const CodecInst* codecInst = NULL) = 0;
+                                   uint32_t stopPosition,
+                                   const CodecInst* codecInst) = 0;
 
   // Note: codecInst is used for pre-encoded files.
   virtual int32_t StartPlayingFile(InStream& sourceStream,
                                    uint32_t startPosition,
                                    float volumeScaling,
                                    uint32_t notification,
-                                   uint32_t stopPosition = 0,
-                                   const CodecInst* codecInst = NULL) = 0;
+                                   uint32_t stopPosition,
+                                   const CodecInst* codecInst) = 0;
 
   virtual int32_t StopPlayingFile() = 0;
 
   virtual bool IsPlayingFile() const = 0;
 
   virtual int32_t GetPlayoutPosition(uint32_t& durationMs) = 0;
 
   // Set audioCodec to the currently used audio codec.
   virtual int32_t AudioCodec(CodecInst& audioCodec) const = 0;
 
   virtual int32_t Frequency() const = 0;
 
   // Note: scaleFactor is in the range [0.0 - 2.0]
   virtual int32_t SetAudioScaling(float scaleFactor) = 0;
 };
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_UTILITY_INCLUDE_FILE_PLAYER_H_