Remove unnecassary parameter "sampleRate" for loadAudioResource().

Source/platform/audio/AudioBus.cpp

 /*
  * Copyright (C) 2010 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 617 matching lines @@
     }
     return true;
 }
 
 void AudioBus::clearSilentFlag()
 {
     for (size_t i = 0; i < m_channels.size(); ++i)
         m_channels[i]->clearSilentFlag();
 }
 
-PassRefPtr<AudioBus> decodeAudioFileData(const char* data, size_t size, double sampleRate)
+PassRefPtr<AudioBus> decodeAudioFileData(const char* data, size_t size)
 {
     blink::WebAudioBus webAudioBus;
-    if (blink::Platform::current()->loadAudioResource(&webAudioBus, data, size, sampleRate))
+    if (blink::Platform::current()->loadAudioResource(&webAudioBus, data, size))
         return webAudioBus.release();
     return nullptr;
 }
 
 PassRefPtr<AudioBus> AudioBus::loadPlatformResource(const char* name, float sampleRate)
 {
     const blink::WebData& resource = blink::Platform::current()->loadResource(name);
     if (resource.isEmpty())
         return nullptr;
 
-    // FIXME: the sampleRate parameter is ignored. It should be removed from the API.
-    RefPtr<AudioBus> audioBus = decodeAudioFileData(resource.data(), resource.size(), sampleRate);
+    RefPtr<AudioBus> audioBus = decodeAudioFileData(resource.data(), resource.size());
 
     if (!audioBus.get())
         return nullptr;
 
     // If the bus is already at the requested sample-rate then return as is.
     if (audioBus->sampleRate() == sampleRate)
         return audioBus;
 
     return AudioBus::createBySampleRateConverting(audioBus.get(), false, sampleRate);
 }
 
 PassRefPtr<AudioBus> createBusFromInMemoryAudioFile(const void* data, size_t dataSize, bool mixToMono, float sampleRate)
 {
-    // FIXME: the sampleRate parameter is ignored. It should be removed from the API.
-    RefPtr<AudioBus> audioBus = decodeAudioFileData(static_cast<const char*>(data), dataSize, sampleRate);
+    RefPtr<AudioBus> audioBus = decodeAudioFileData(static_cast<const char*>(data), dataSize);
     if (!audioBus.get())
         return nullptr;
 
     // If the bus needs no conversion then return as is.
     if ((!mixToMono || audioBus->numberOfChannels() == 1) && audioBus->sampleRate() == sampleRate)
         return audioBus;
 
     return AudioBus::createBySampleRateConverting(audioBus.get(), mixToMono, sampleRate);
 }
 
 } // WebCore
 
 #endif // ENABLE(WEB_AUDIO)