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

chrome/browser/speech/speech_recognition_request.h

Index: chrome/browser/speech/speech_recognition_request.h
diff --git a/chrome/browser/speech/speech_recognition_request.h b/chrome/browser/speech/speech_recognition_request.h
index c12fc4d31513f8a82d118464787d000363d76e86..9b022cf062182ba0dccb7328ae3ea5aecd7f5d6c 100644
--- a/chrome/browser/speech/speech_recognition_request.h
+++ b/chrome/browser/speech/speech_recognition_request.h
@@ -48,6 +48,7 @@ class SpeechRecognitionRequest : public URLFetcher::Delegate {
   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);