Add notification mechanism when BrowserActionButton's icon has been updated.

ui/views/controls/menu/menu_item_view.cc

Index: ui/views/controls/menu/menu_item_view.cc
diff --git a/ui/views/controls/menu/menu_item_view.cc b/ui/views/controls/menu/menu_item_view.cc
index 15e7db39e64f632c32e0b4c4dd29f646515b5a0f..a86edd8b6b245964441ae8c6dacfe72398c439c1 100644
--- a/ui/views/controls/menu/menu_item_view.cc
+++ b/ui/views/controls/menu/menu_item_view.cc
@@ -88,6 +88,8 @@ int MenuItemView::pref_menu_height_;
 // static
 const char MenuItemView::kViewClassName[] = "MenuItemView";
 
+// Note: This class also has a protected constructor and a common Init function
+// to initialize both.
 MenuItemView::MenuItemView(MenuDelegate* delegate)
     : delegate_(delegate),
       controller_(NULL),
@@ -559,6 +561,8 @@ const MenuConfig& MenuItemView::GetMenuConfig() const {
   return MenuConfig::instance(NULL);
 }
 
+// Note: This class also has a public constructor and a common Init function

[sky, 2014/02/19 15:01:19]

These comments aren't helpful, nuke them.

+// to initialize both.
 MenuItemView::MenuItemView(MenuItemView* parent,
                            int command,
                            MenuItemView::Type type)