If user had consented for metrics reporting, send speech input request origin to the server.

chrome/browser/speech/speech_recognition_request.h

 // Copyright (c) 2011 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 CHROME_BROWSER_SPEECH_SPEECH_RECOGNITION_REQUEST_H_
 #define CHROME_BROWSER_SPEECH_SPEECH_RECOGNITION_REQUEST_H_
 #pragma once
 
 #include <string>
 #include "base/basictypes.h"
@@ skipping 30 matching lines @@
                            Delegate* delegate);
 
   virtual ~SpeechRecognitionRequest();
 
   // Sends a new request with the given audio data, returns true if successful.
   // The same object can be used to send multiple requests but only after the
   // previous request has completed.
   bool Send(const std::string& language,
             const std::string& grammar,
             const std::string& hardware_info,
+            const std::string& origin_url,
             const std::string& content_type,
             const std::string& audio_data);
 
   bool HasPendingRequest() { return url_fetcher_ != NULL; }
 
   // URLFetcher::Delegate methods.
   virtual void OnURLFetchComplete(const URLFetcher* source,
                                   const GURL& url,
                                   const net::URLRequestStatus& status,
                                   int response_code,
@@ skipping 10 matching lines @@
 
 // This typedef is to workaround the issue with certain versions of
 // Visual Studio where it gets confused between multiple Delegate
 // classes and gives a C2500 error. (I saw this error on the try bots -
 // the workaround was not needed for my machine).
 typedef SpeechRecognitionRequest::Delegate SpeechRecognitionRequestDelegate;
 
 }  // namespace speech_input
 
 #endif  // CHROME_BROWSER_SPEECH_SPEECH_RECOGNITION_REQUEST_H_