Show a different icon in the launcher for incognito windows

ash/launcher/launcher_types.cc

Index: ash/launcher/launcher_types.cc
diff --git a/ash/launcher/launcher_types.cc b/ash/launcher/launcher_types.cc
index 07e306e9d160dd09478f18608183c8fcdab122e7..01f143ed24aeeaaf47a94867637f88b8d454fbd1 100644
--- a/ash/launcher/launcher_types.cc
+++ b/ash/launcher/launcher_types.cc
@@ -9,13 +9,7 @@ namespace ash {
 LauncherItem::LauncherItem()
     : type(TYPE_TABBED),
       num_tabs(1),
-      id(0),
-      status(STATUS_CLOSED) {
-}
-
-LauncherItem::LauncherItem(LauncherItemType type)
-    : type(type),
-      num_tabs(0),
+      is_incognito(false),
       id(0),
       status(STATUS_CLOSED) {
 }