Add WebKit API to retrieve the audio hardware sample-rate

content/renderer/renderer_webkitclient_impl.h

 // Copyright (c) 2010 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_RENDERER_WEBKITCLIENT_IMPL_H_
 #define CONTENT_RENDERER_RENDERER_WEBKITCLIENT_IMPL_H_
 #pragma once
 
 #include "base/platform_file.h"
 #include "base/scoped_ptr.h"
@@ skipping 56 matching lines @@
       const WebKit::WebString& keyPath,
       WebKit::WebVector<WebKit::WebIDBKey>& keys);
   virtual WebKit::WebSerializedScriptValue injectIDBKeyIntoSerializedValue(
       const WebKit::WebIDBKey& key,
       const WebKit::WebSerializedScriptValue& value,
       const WebKit::WebString& keyPath);
   virtual WebKit::WebFileSystem* fileSystem();
 
   virtual WebKit::WebSharedWorkerRepository* sharedWorkerRepository();
   virtual WebKit::WebGraphicsContext3D* createGraphicsContext3D();
+  virtual double audioHardwareSampleRate();
   virtual WebKit::WebAudioDevice* createAudioDevice(
       size_t buffer_size, unsigned channels, double sample_rate,
       WebKit::WebAudioDevice::RenderCallback* callback);
 
   virtual WebKit::WebBlobRegistry* blobRegistry();
 
  private:
   bool CheckPreparsedJsCachingEnabled() const;
 
   // Helper function to send synchronous message from any thread.
@@ skipping 21 matching lines @@
   scoped_ptr<WebSharedWorkerRepositoryImpl> shared_worker_repository_;
 
   scoped_ptr<WebKit::WebIDBFactory> web_idb_factory_;
 
   scoped_ptr<WebFileSystemImpl> web_file_system_;
 
   scoped_ptr<WebKit::WebBlobRegistry> blob_registry_;
 };
 
 #endif  // CONTENT_RENDERER_RENDERER_WEBKITCLIENT_IMPL_H_