Add experiment for having a "Beta forum" link in the help menu.

chrome/browser/ui/toolbar/app_menu_model.cc

Index: chrome/browser/ui/toolbar/app_menu_model.cc
diff --git a/chrome/browser/ui/toolbar/app_menu_model.cc b/chrome/browser/ui/toolbar/app_menu_model.cc
index f0a6172f36247984bbc032b568e5c3ed46c3a432..f9468e714b1ef1382ee070b083512881b9a19cc0 100644
--- a/chrome/browser/ui/toolbar/app_menu_model.cc
+++ b/chrome/browser/ui/toolbar/app_menu_model.cc
@@ -68,6 +68,10 @@
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_skia.h"
 
+#if defined(GOOGLE_CHROME_BUILD)
+#include "base/feature_list.h"
+#endif
+
 #if defined(OS_CHROMEOS)
 #include "chromeos/chromeos_switches.h"
 #endif
@@ -129,6 +133,9 @@ void ZoomMenuModel::Build() {
 
 #if defined(GOOGLE_CHROME_BUILD)
 
+const base::Feature kIncludeBetaForumMenuItem{
+    "IncludeBetaForumMenuItem", base::FEATURE_DISABLED_BY_DEFAULT};
+
 class AppMenuModel::HelpMenuModel : public ui::SimpleMenuModel {
  public:
   HelpMenuModel(ui::SimpleMenuModel::Delegate* delegate,
@@ -146,6 +153,8 @@ class AppMenuModel::HelpMenuModel : public ui::SimpleMenuModel {
 #endif
     AddItem(IDC_ABOUT, l10n_util::GetStringUTF16(IDS_ABOUT));
     AddItemWithStringId(IDC_HELP_PAGE_VIA_MENU, help_string_id);
+    if (base::FeatureList::IsEnabled(kIncludeBetaForumMenuItem))
+      AddItem(IDC_SHOW_BETA_FORUM, l10n_util::GetStringUTF16(IDS_BETA_FORUM));
     if (browser_defaults::kShowHelpMenuItemIcon) {
       ui::ResourceBundle& rb = ResourceBundle::GetSharedInstance();
       SetIcon(GetIndexOfCommandId(IDC_HELP_PAGE_VIA_MENU),
@@ -542,6 +551,11 @@ void AppMenuModel::LogMenuMetrics(int command_id) {
       LogMenuAction(MENU_ACTION_HELP_PAGE_VIA_MENU);
       break;
   #if defined(GOOGLE_CHROME_BUILD)
+    case IDC_SHOW_BETA_FORUM:
+      if (!uma_action_recorded_)
+        UMA_HISTOGRAM_MEDIUM_TIMES("WrenchMenu.TimeToAction.BetaForum", delta);
+      LogMenuAction(MENU_ACTION_BETA_FORUM);
+      break;
     case IDC_FEEDBACK:
       if (!uma_action_recorded_)
         UMA_HISTOGRAM_MEDIUM_TIMES("WrenchMenu.TimeToAction.Feedback", delta);