Dynamically calculate the number of extension icons to show per row in overflow

ui/views/controls/menu/menu_item_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/menu_item_view.h"
 
 #include "base/i18n/case_conversion.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "ui/accessibility/ax_view_state.h"
@@ skipping 392 matching lines @@
 void MenuItemView::OnPaint(gfx::Canvas* canvas) {
   PaintButton(canvas, PB_NORMAL);
 }
 
 gfx::Size MenuItemView::GetPreferredSize() const {
   const MenuItemDimensions& dimensions(GetDimensions());
   return gfx::Size(dimensions.standard_width + dimensions.children_width,
                    dimensions.height);
 }
 
+int MenuItemView::GetHeightForWidth(int width) const {
+  // If this isn't a container, we can just use the preferred size's height.
+  if (!IsContainer())
+    return GetPreferredSize().height();
+
+  int height = child_at(0)->GetHeightForWidth(width);
+  if (!icon_view_ && GetRootMenuItem()->has_icons())
+    height = std::max(height, GetMenuConfig().check_height);
+  height += GetBottomMargin() + GetTopMargin();
+
+  // There's a chance our dimensions changed as a result of this. If so,
+  // invalidate them so they get recalculated as needed.
+  if (is_dimensions_valid() && height != GetDimensions().height)
+    invalidate_dimensions();
+
+  return height;
+}
+
 const MenuItemView::MenuItemDimensions& MenuItemView::GetDimensions() const {
   if (!is_dimensions_valid())
     dimensions_ = CalculateDimensions();
   DCHECK(is_dimensions_valid());
   return dimensions_;
 }
 
 MenuController* MenuItemView::GetMenuController() {
   return GetRootMenuItem()->controller_;
 }
@@ skipping 641 matching lines @@
     } else {
       const Type& type = menu_item->GetType();
       if (type == CHECKBOX || type == RADIO)
         return true;
     }
   }
   return false;
 }
 
 }  // namespace views