Revert of Delete dead signin code (SigninGlobalError)

chrome/browser/ui/cocoa/panels/panel_cocoa_unittest.mm

Index: chrome/browser/ui/cocoa/panels/panel_cocoa_unittest.mm
diff --git a/chrome/browser/ui/cocoa/panels/panel_cocoa_unittest.mm b/chrome/browser/ui/cocoa/panels/panel_cocoa_unittest.mm
index a11e498b966391f55663de8bd5d1701009f01cd4..1e3f17fe9334727b7e65814ce954b9970f6a38de 100644
--- a/chrome/browser/ui/cocoa/panels/panel_cocoa_unittest.mm
+++ b/chrome/browser/ui/cocoa/panels/panel_cocoa_unittest.mm
@@ -308,6 +308,7 @@
   NSMenuItem* fullscreen_menu_item = CreateMenuItem(menu, IDC_FULLSCREEN);
   NSMenuItem* presentation_menu_item =
       CreateMenuItem(menu, IDC_PRESENTATION_MODE);
+  NSMenuItem* sync_menu_item = CreateMenuItem(menu, IDC_SHOW_SYNC_SETUP);
   NSMenuItem* dev_tools_item = CreateMenuItem(menu, IDC_DEV_TOOLS);
   NSMenuItem* dev_tools_console_item =
       CreateMenuItem(menu, IDC_DEV_TOOLS_CONSOLE);
@@ -326,6 +327,7 @@
   EXPECT_FALSE([find_next_menu_item isEnabled]);
   EXPECT_FALSE([fullscreen_menu_item isEnabled]);
   EXPECT_FALSE([presentation_menu_item isEnabled]);
+  EXPECT_FALSE([sync_menu_item isEnabled]);
   // These are not enabled by Panel, so they are expected to be disabled for
   // this unit_test. In real Chrome app, they are enabled by Chrome NSApp
   // controller. PanelCocoaBrowsertest.MenuItems verifies that.
@@ -335,6 +337,11 @@
 
   EXPECT_TRUE([dev_tools_item isEnabled]);
   EXPECT_TRUE([dev_tools_console_item isEnabled]);
+
+  // Verify that commandDispatch on an invalid menu item does not crash.
+  [NSApp sendAction:[sync_menu_item action]
+                 to:[sync_menu_item target]
+               from:sync_menu_item];
 
   ClosePanelAndWait(panel);
 }