Enable mash shelf tooltips.

ash/test/shelf_test_api.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/test/shelf_test_api.h"
 
 #include "ash/shelf/shelf.h"
 
 namespace ash {
 namespace test {
 
-ShelfTestAPI::ShelfTestAPI(Shelf* shelf)
-    : shelf_(shelf) {
-}
+ShelfTestAPI::ShelfTestAPI(Shelf* shelf) : shelf_(shelf) {}
 
-ShelfTestAPI::~ShelfTestAPI() {
-}
+ShelfTestAPI::~ShelfTestAPI() {}
 
 ShelfView* ShelfTestAPI::shelf_view() { return shelf_->shelf_view_; }
 
 void ShelfTestAPI::SetShelfDelegate(ShelfDelegate* delegate) {
   shelf_->delegate_ = delegate;
 }
 
 }  // namespace test
 }  // namespace ash