views: Make view::Views::GetPreferredSize() const.

ui/views/controls/menu/submenu_view.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/submenu_view.h"
 
 #include <algorithm>
 
 #include "base/compiler_specific.h"
 #include "ui/accessibility/ax_view_state.h"
@@ skipping 103 matching lines @@
   for (int i = 0; i < child_count(); ++i) {
     View* child = child_at(i);
     if (child->visible()) {
       gfx::Size child_pref_size = child->GetPreferredSize();
       child->SetBounds(x, y, menu_item_width, child_pref_size.height());
       y += child_pref_size.height();
     }
   }
 }
 
-gfx::Size SubmenuView::GetPreferredSize() {
+gfx::Size SubmenuView::GetPreferredSize() const {
   if (!has_children())
     return gfx::Size();
 
   max_minor_text_width_ = 0;
   // The maximum width of items which contain maybe a label and multiple views.
   int max_complex_width = 0;
   // The max. width of items which contain a label and maybe an accelerator.
   int max_simple_width = 0;
   int height = 0;
   for (int i = 0; i < child_count(); ++i) {
-    View* child = child_at(i);
+    const View* child = child_at(i);
     if (!child->visible())
       continue;
     if (child->id() == MenuItemView::kMenuItemViewID) {
-      MenuItemView* menu = static_cast<MenuItemView*>(child);
+      const MenuItemView* menu = static_cast<const MenuItemView*>(child);
       const MenuItemView::MenuItemDimensions& dimensions =
           menu->GetDimensions();
       max_simple_width = std::max(
           max_simple_width, dimensions.standard_width);
       max_minor_text_width_ =
           std::max(max_minor_text_width_, dimensions.minor_text_width);
       max_complex_width = std::max(max_complex_width,
           dimensions.standard_width + dimensions.children_width);
       height += dimensions.height;
     } else {
@@ skipping 342 matching lines @@
   y = std::max(y, 0);
   gfx::Rect new_vis_bounds(x, y, vis_bounds.width(), vis_bounds.height());
   if (new_vis_bounds != vis_bounds) {
     ScrollRectToVisible(new_vis_bounds);
     return true;
   }
   return false;
 }
 
 }  // namespace views