Change GetBrowserItemIndex() to GetLauncherItemIndexForType()

ash/shelf/shelf_util.h

 // 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.
 
 #ifndef ASH_SHELF_SHELF_UTIL_H_
 #define ASH_SHELF_SHELF_UTIL_H_
 
 #include "ash/ash_export.h"
+#include "ash/launcher/launcher_types.h"
 
 namespace ash {
 
 class LauncherModel;
 
-// Return the index of the browser item from a given |launcher_model|.
-ASH_EXPORT int GetBrowserItemIndex(const LauncherModel& launcher_model);
+// Return the index of the |type| from a given |launcher_model|.
+// |type| should be either TYPE_BROWSER_SHORTCUT or TYPE_APP_LIST.
+ASH_EXPORT int GetLauncherItemIndexForType(LauncherItemType type,
+                                           const LauncherModel& launcher_model);
 
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_UTIL_H_