Makes bookmark menu lazily create menus and removes limits

ui/views/controls/menu/menu_controller.cc

 // Copyright (c) 2012 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 "ui/views/controls/menu/menu_controller.h"
 
 #include "base/i18n/case_conversion.h"
 #include "base/i18n/rtl.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
@@ skipping 1497 matching lines @@
 }
 
 void MenuController::OpenMenuImpl(MenuItemView* item, bool show) {
   // TODO(oshima|sky): Don't show the menu if drag is in progress and
   // this menu doesn't support drag drop. See crbug.com/110495.
   if (show) {
     int old_count = item->GetSubmenu()->child_count();
     item->GetDelegate()->WillShowMenu(item);
     if (old_count != item->GetSubmenu()->child_count()) {
       // If the number of children changed then we may need to add empty items.
+      item->RemoveEmptyMenus();
       item->AddEmptyMenus();
     }
   }
   bool prefer_leading =
       state_.open_leading.empty() ? true : state_.open_leading.back();
   bool resulting_direction;
   gfx::Rect bounds = MenuItemView::IsBubble(state_.anchor) ?
       CalculateBubbleMenuBounds(item, prefer_leading, &resulting_direction) :
       CalculateMenuBounds(item, prefer_leading, &resulting_direction);
   state_.open_leading.push_back(resulting_direction);
@@ skipping 799 matching lines @@
   }
 }
 
 gfx::Screen* MenuController::GetScreen() {
   Widget* root = owner_ ? owner_->GetTopLevelWidget() : NULL;
   return root ? gfx::Screen::GetScreenFor(root->GetNativeView())
               : gfx::Screen::GetNativeScreen();
 }
 
 }  // namespace views