Add UMA histogram to track the various sources that request the feedback app

chrome/browser/ui/webui/help/help_handler.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/ui/webui/help/help_handler.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 520 matching lines @@
 
 void HelpHandler::RelaunchNow(const base::ListValue* args) {
   DCHECK(args->empty());
   chrome::AttemptRelaunch();
 }
 
 void HelpHandler::OpenFeedbackDialog(const base::ListValue* args) {
   DCHECK(args->empty());
   Browser* browser = chrome::FindBrowserWithWebContents(
       web_ui()->GetWebContents());
-  chrome::OpenFeedbackDialog(browser);
+  chrome::OpenFeedbackDialog(browser,
+                             chrome::kFeedbackSourceOldSettingsAboutPage);
 }
 
 void HelpHandler::OpenHelpPage(const base::ListValue* args) {
   DCHECK(args->empty());
   Browser* browser = chrome::FindBrowserWithWebContents(
       web_ui()->GetWebContents());
   chrome::ShowHelp(browser, chrome::HELP_SOURCE_WEBUI);
 }
 
 #if defined(OS_CHROMEOS)
@@ skipping 200 matching lines @@
                                            base::Value("device_supported"),
                                            base::Value(""));
   } else {
     web_ui()->CallJavascriptFunctionUnsafe(
         "help.HelpPage.updateEolMessage", base::Value("device_endoflife"),
         base::Value(l10n_util::GetStringUTF16(IDS_ABOUT_PAGE_EOL_EOL)));
   }
 }
 
 #endif  // defined(OS_CHROMEOS)