Simplify the user agent code some more since after r255534 it's not affected by the site's URL.

chrome/browser/feedback/feedback_util.cc

Index: chrome/browser/feedback/feedback_util.cc
===================================================================
--- chrome/browser/feedback/feedback_util.cc	(revision 255867)
+++ chrome/browser/feedback/feedback_util.cc	(working copy)
@@ -31,6 +31,7 @@
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/common/chrome_content_client.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/metrics/metrics_log_manager.h"
@@ -165,7 +166,7 @@
 
   userfeedback::WebData* web_data = feedback_data.mutable_web_data();
   web_data->set_url(data->page_url());
-  web_data->mutable_navigator()->set_user_agent(content::GetUserAgent(GURL()));
+  web_data->mutable_navigator()->set_user_agent(GetUserAgent());
 
   gfx::Rect screen_size;
   if (data->sys_info()) {