MacViews: Modify insertText handlers to correctly handle space key and simplify menu event dispatch.

ui/views/controls/menu/menu_controller.h

Index: ui/views/controls/menu/menu_controller.h
diff --git a/ui/views/controls/menu/menu_controller.h b/ui/views/controls/menu/menu_controller.h
index 20c1bee5d2fc082c8e8e282c4e3f77f4f4d8bb2f..e0940352cce4fe46d2cc7bb4581d9a67c5d4b3fa 100644
--- a/ui/views/controls/menu/menu_controller.h
+++ b/ui/views/controls/menu/menu_controller.h
@@ -176,11 +176,10 @@ class VIEWS_EXPORT MenuController : public WidgetObserver {
   void OnDragComplete(bool should_close);
 
   // Called while dispatching messages to intercept key events.
-  // If |character| is other than 0, it is handled as a mnemonic.
-  // Otherwise, |key_code| is handled as a menu navigation command.
+  // If |event| is a character event, it is handled as a mnemonic.
+  // Otherwise, it is handled as a menu navigation command.
   // Returns ui::POST_DISPATCH_NONE if the event was swallowed by the menu.
-  ui::PostDispatchAction OnWillDispatchKeyEvent(base::char16 character,
-                                                ui::KeyboardCode key_code);
+  ui::PostDispatchAction OnWillDispatchKeyEvent(const ui::KeyEvent& event);
 
   // Update the submenu's selection based on the current mouse location
   void UpdateSubmenuSelection(SubmenuView* source);