Add chrome://flags for update menu item

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index c0446125d9abe4be4062b0f8915b862aea821f55..be5d012ace1ab262d9d3718f3d36b233e200d96b 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1328,6 +1328,21 @@ const char kEnableWaylandServer[] = "enable-wayland-server";
 // fullscreen.
 const char kDisableAutoHidingToolbarThreshold[] =
     "disable-auto-hiding-toolbar-threshold";
+
+// Forces the update menu item to show.
+const char kForceShowUpdateMenuItem[] = "force-show-update-menu-item";
+
+// Forces a summary to be displayed below the update menu item.
+const char kForceShowUpdateMenuItemSummary[] = "show_summary";
+
+// Forces a custom summary to be displayed below the update menu item.
+const char kForceShowUpdateMenuItemCustomSummary[] = "custom_summary";
+
+// Forces the update menu badge to show.
+const char kForceShowUpdateMenuBadge[] = "force-show-update-menu-badge";
+
+// Sets the market URL for Chrome for use in testing.
+const char kMarketUrlForTesting[] = "market-url-for-testing";
 #endif // defined(OS_ANDROID)
 
 #if defined(OS_WIN) || defined(OS_LINUX)