Show a different icon in the launcher for incognito windows

ash/launcher/launcher_types.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/launcher/launcher_types.h"
 
 namespace ash {
 
 LauncherItem::LauncherItem()
     : type(TYPE_TABBED),
       num_tabs(1),
+      is_incognito(false),
       id(0),
       status(STATUS_CLOSED) {
 }
-
-LauncherItem::LauncherItem(LauncherItemType type)
-    : type(type),
-      num_tabs(0),
-      id(0),
-      status(STATUS_CLOSED) {
-}
 
 LauncherItem::~LauncherItem() {
 }
 
 }  // namespace ash