Remove unnecassary parameter "sampleRate" for loadAudioResource().

content/renderer/media/android/audio_decoder_android.h

 // Copyright 2013 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 CONTENT_RENDERER_MEDIA_ANDROID_AUDIO_DECODER_ANDROID_H_
 #define CONTENT_RENDERER_MEDIA_ANDROID_AUDIO_DECODER_ANDROID_H_
 
 #include "content/child/thread_safe_sender.h"
 
 namespace blink {
 class WebAudioBus;
 }
 
 namespace content {
 
 bool DecodeAudioFileData(blink::WebAudioBus* destination_bus,
                          const char* data,
                          size_t data_size,
-                         double sample_rate,
                          scoped_refptr<ThreadSafeSender> sender);
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_ANDROID_AUDIO_DECODER_ANDROID_H_