Show a different icon in the launcher for incognito windows

ash/launcher/launcher_types.h

Index: ash/launcher/launcher_types.h
diff --git a/ash/launcher/launcher_types.h b/ash/launcher/launcher_types.h
index 1bc0f781051a187f864784545d0c966b8daf2a0d..403f80281ecc1255f43dec1712ace3a06d7f5397 100644
--- a/ash/launcher/launcher_types.h
+++ b/ash/launcher/launcher_types.h
@@ -43,7 +43,6 @@ enum ASH_EXPORT LauncherItemStatus {
 
 struct ASH_EXPORT LauncherItem {
   LauncherItem();
-  explicit LauncherItem(LauncherItemType type);
   ~LauncherItem();
 
   LauncherItemType type;
@@ -51,6 +50,9 @@ struct ASH_EXPORT LauncherItem {
   // Number of tabs. Only used if this is TYPE_TABBED.
   int num_tabs;
 
+  // Whether it is incognito. Only used if this is TYPE_TABBED.
+  bool is_incognito;
+
   // Image to display in the launcher. If this item is TYPE_TABBED the image is
   // a favicon image.
   SkBitmap image;