Remove unnecassary parameter "sampleRate" for loadAudioResource().

public/platform/Platform.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 375 matching lines @@
 
 
     // Resources -----------------------------------------------------------
 
     // Returns a blob of data corresponding to the named resource.
     virtual WebData loadResource(const char* name) { return WebData(); }
 
     // Decodes the in-memory audio file data and returns the linear PCM audio data in the destinationBus.
     // A sample-rate conversion to sampleRate will occur if the file data is at a different sample-rate.
     // Returns true on success.
-    virtual bool loadAudioResource(WebAudioBus* destinationBus, const char* audioFileData, size_t dataSize, double sampleRate) { return false; }
-
+    virtual bool loadAudioResource(WebAudioBus* destinationBus, const char* audioFileData, size_t dataSize) { return false; }
 
     // Screen -------------------------------------------------------------
 
     // Supplies the system monitor color profile.
     virtual void screenColorProfile(WebVector<char>* profile) { }
 
 
     // Scrollbar ----------------------------------------------------------
 
     // Must return non-null.
@@ skipping 231 matching lines @@
     virtual WebDatabaseObserver* databaseObserver() { return 0; }
 
 
 protected:
     virtual ~Platform() { }
 };
 
 } // namespace blink
 
 #endif