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 a8ddb317427c745b4faf585a62eb2ecf01ca4b03..1b721fbbb96d76fe2e834416ff7d3f60545726f3 100644
--- a/ash/launcher/launcher_types.h
+++ b/ash/launcher/launcher_types.h
@@ -36,7 +36,6 @@ enum ASH_EXPORT LauncherItemType {
 
 struct ASH_EXPORT LauncherItem {
   LauncherItem();
-  explicit LauncherItem(LauncherItemType type);
   ~LauncherItem();
 
   LauncherItemType type;
@@ -44,6 +43,9 @@ 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;