Added flag for alternate launcher settings (remaining changes to come).

ash/shelf/shelf_layout_manager.h

Index: ash/shelf/shelf_layout_manager.h
diff --git a/ash/shelf/shelf_layout_manager.h b/ash/shelf/shelf_layout_manager.h
index b68206c7ed894b0690587888301b0dcdfc1fb7a6..070e6d5a5e2bf0ed58df4b23b93755962be1e764 100644
--- a/ash/shelf/shelf_layout_manager.h
+++ b/ash/shelf/shelf_layout_manager.h
@@ -69,6 +69,10 @@ class ASH_EXPORT ShelfLayoutManager :
   // Size of the shelf when auto-hidden.
   static const int kAutoHideSize;
 
+  // The size of the shelf when shown (currently only used in alternate
+  // settings see ash::switches::UseAlternateShelfLayout).
+  static const int kShelfSize;
+
   explicit ShelfLayoutManager(ShelfWidget* shelf);
   virtual ~ShelfLayoutManager();