Align panel icons on the right / end.

ash/launcher/launcher_model.cc

Index: ash/launcher/launcher_model.cc
diff --git a/ash/launcher/launcher_model.cc b/ash/launcher/launcher_model.cc
index 7f6e113ff16f326a8774ce95d295e91c91cbc543..3c1e768f2748e3625aa3ed873af27346eecc0f9c 100644
--- a/ash/launcher/launcher_model.cc
+++ b/ash/launcher/launcher_model.cc
@@ -19,11 +19,12 @@ int LauncherItemTypeToWeight(LauncherItemType type) {
     case TYPE_APP_SHORTCUT:
       return 1;
     case TYPE_TABBED:
-    case TYPE_APP_PANEL:
     case TYPE_PLATFORM_APP:
       return 2;
     case TYPE_APP_LIST:
       return 3;
+    case TYPE_APP_PANEL:
+      return 4;
   }
 
   NOTREACHED() << "Invalid type " << type;
@@ -117,6 +118,13 @@ LauncherItems::const_iterator LauncherModel::ItemByID(int id) const {
   return items_.end();
 }
 
+int LauncherModel::FirstPanelIndex() const {
+  LauncherItem weight_dummy;
+  weight_dummy.type = TYPE_APP_PANEL;
+  return std::lower_bound(items_.begin(), items_.end(), weight_dummy,
+                          CompareByWeight) - items_.begin();
+}
+
 void LauncherModel::SetStatus(Status status) {
   if (status_ == status)
     return;