Reverse menu anchor position provided to views::MenuItemView for RTL languages.

views/controls/menu/menu_item_view.h

 // Copyright (c) 2011 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 VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_
 #define VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 72 matching lines @@
   // menus that is only used internally.
   enum Type {
     NORMAL,
     SUBMENU,
     CHECKBOX,
     RADIO,
     SEPARATOR,
     EMPTY
   };
 
-  // Where the menu should be anchored to.
+  // Where the menu should be anchored to for non-RTL languages.  The
+  // opposite position will be used if base::i18n:IsRTL() is true.
   enum AnchorPosition {
     TOPLEFT,
     TOPRIGHT
   };
 
   // Constructor for use with the top level menu item. This menu is never
   // shown to the user, rather its use as the parent for all menu items.
   explicit MenuItemView(MenuDelegate* delegate);
 
   virtual ~MenuItemView();
@@ skipping 11 matching lines @@
   static int label_start() { return label_start_; }
 
   // Returns the accessible name to be used with screen readers. Mnemonics are
   // removed and the menu item accelerator text is appended.
   static string16 GetAccessibleNameForMenuItem(
       const string16& item_text, const string16& accelerator_text);
 
   // Run methods. See description above class for details. Both Run methods take
   // a rectangle, which is used to position the menu. |has_mnemonics| indicates
   // whether the items have mnemonics. Mnemonics are identified by way of the
-  // character following the '&'.
+  // character following the '&'.  The anchor position is specified for non-RTL
+  // languages; the opposite value will be used for RTL.
   void RunMenuAt(gfx::NativeWindow parent,
                  MenuButton* button,
                  const gfx::Rect& bounds,
                  AnchorPosition anchor,
                  bool has_mnemonics);
   void RunMenuForDropAt(gfx::NativeWindow parent,
                         const gfx::Rect& bounds,
                         AnchorPosition anchor);
 
   // Hides and cancels the menu. This does nothing if the menu is not open.
@@ skipping 326 matching lines @@
   // Margins in pixels.
   int top_margin_;
   int bottom_margin_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuItemView);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_