[ash] Add TYPE_DIALOG and its item's LauncherContextMenu

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index dc76edc10c8ac4e36edd1b70d0c7522d826d7fff..5d1d12018814a9dd1851a484e1f7c59b71cbbfac 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -127,12 +127,18 @@ aura::client::UserActionClient* ChromeShellDelegate::CreateUserActionClient() {
   return new UserActionHandler;
 }
 
-ui::MenuModel* ChromeShellDelegate::CreateContextMenu(aura::Window* root) {
+ui::MenuModel* ChromeShellDelegate::CreateContextMenu(
+    aura::Window* root,
+    ash::ShelfItemDelegate* item_delegate,
+    ash::LauncherItem* item) {
   DCHECK(shelf_delegate_);
   // Don't show context menu for exclusive app runtime mode.
   if (chrome::IsRunningInAppMode())
     return NULL;
 
+  if (item_delegate && item)
+    return new LauncherContextMenu(shelf_delegate_, item_delegate, item, root);
+
   return new LauncherContextMenu(shelf_delegate_, root);
 }