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

chrome/common/net/url_fetcher.h

Index: chrome/common/net/url_fetcher.h
diff --git a/chrome/common/net/url_fetcher.h b/chrome/common/net/url_fetcher.h
index dfa29a913a2291d86eb7d33335dc208908830909..19edbb9db3484ec9b1546da7df84f95f55477a32 100644
--- a/chrome/common/net/url_fetcher.h
+++ b/chrome/common/net/url_fetcher.h
@@ -139,6 +139,10 @@ class URLFetcher {
   // Returns the current load flags.
   int load_flags() const;
 
+  // The referrer URL for the request. Must be called before the request is
+  // started.
+  void set_referrer(const std::string& referrer);
+
   // Set extra headers on the request.  Must be called before the request
   // is started.
   void set_extra_request_headers(const std::string& extra_request_headers);