Fixes possible crash in bookmark menus. Specifically if you had a menu...

views/controls/menu/chrome_menu.h

Index: views/controls/menu/chrome_menu.h
===================================================================
--- views/controls/menu/chrome_menu.h	(revision 22055)
+++ views/controls/menu/chrome_menu.h	(working copy)
@@ -714,7 +714,7 @@
       SCROLL_DOWN
     };
 
-    MenuPart() : type(NONE), menu(NULL), submenu(NULL) {}
+    MenuPart() : type(NONE), menu(NULL), parent(NULL), submenu(NULL) {}
 
     // Convenience for testing type == SCROLL_DOWN or type == SCROLL_UP.
     bool is_scroll() const { return type == SCROLL_DOWN || type == SCROLL_UP; }
@@ -726,9 +726,14 @@
     // this is NULL.
     // NOTE: if type is MENU_ITEM and the mouse is not over a valid menu item
     //       but is over a menu (for example, the mouse is over a separator or
-    //       empty menu), this is NULL.
+    //       empty menu), this is NULL and parent is the menu the mouse was
+    //       clicked on.
     MenuItemView* menu;
 
+    // If type is MENU_ITEM but the mouse is not over a menu item this is the
+    // parent of the menu item the user clicked on. Otherwise this is NULL.
+    MenuItemView* parent;
+
     // If type is SCROLL_*, this is the submenu the mouse is over.
     SubmenuView* submenu;
   };