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

chrome/browser/ui/browser_commands.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_BROWSER_COMMANDS_H_
 #define CHROME_BROWSER_UI_BROWSER_COMMANDS_H_
 
 #include <string>
 
 #include "build/build_config.h"
 #include "chrome/browser/devtools/devtools_toggle_action.h"
+#include "chrome/browser/ui/chrome_pages.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
 #include "content/public/common/page_zoom.h"
 #include "printing/features/features.h"
 #include "ui/base/window_open_disposition.h"
 
 class Browser;
 class CommandObserver;
 class GURL;
 class Profile;
 
@@ skipping 101 matching lines @@
 void FocusLocationBar(Browser* browser);
 void FocusSearch(Browser* browser);
 void FocusAppMenu(Browser* browser);
 void FocusBookmarksToolbar(Browser* browser);
 void FocusInfobars(Browser* browser);
 void FocusNextPane(Browser* browser);
 void FocusPreviousPane(Browser* browser);
 void ToggleDevToolsWindow(Browser* browser, DevToolsToggleAction action);
 bool CanOpenTaskManager();
 void OpenTaskManager(Browser* browser);
-void OpenFeedbackDialog(Browser* browser);
+void OpenFeedbackDialog(Browser* browser, FeedbackSource source);
 void ToggleBookmarkBar(Browser* browser);
 void ShowAppMenu(Browser* browser);
 void ShowAvatarMenu(Browser* browser);
 void OpenUpdateChromeDialog(Browser* browser);
 void DistillCurrentPage(Browser* browser);
 bool CanRequestTabletSite(content::WebContents* current_tab);
 bool IsRequestingTabletSite(Browser* browser);
 void ToggleRequestTabletSite(Browser* browser);
 void ToggleFullscreenMode(Browser* browser);
 void ClearCache(Browser* browser);
@@ skipping 10 matching lines @@
 
 void ViewSelectedSource(Browser* browser);
 bool CanViewSource(const Browser* browser);
 
 void CreateBookmarkAppFromCurrentWebContents(Browser* browser);
 bool CanCreateBookmarkApp(const Browser* browser);
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_BROWSER_COMMANDS_H_