Refactor menu controller to isolate aura dependency.

ui/views/controls/menu/menu_config_mac.cc

 // Copyright 2014 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_config.h"
 
+#include "grit/ui_resources.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image_skia.h"
+#include "ui/native_theme/native_theme_mac.h"
+#include "ui/views/controls/menu/menu_image_util.h"
+
 namespace views {
 
 void MenuConfig::Init(const ui::NativeTheme* theme) {
-  NOTIMPLEMENTED();
+  // TODO: Tune these parameters for Mac.

[tapted, 2014/05/08 00:25:28]

nit: TODOs should have a username in brackets - usually the person who added it
:).

To minimise churn, It may even be better just setting a couple of these (i.e.
just so it's usable), and emitting NOTIMPLEMENTED()

[Andre, 2014/05/09 01:10:01]

Ok, deleted them and replaced with NOTIMPLEMENTED().
It's not clear what needs to be set to make it usable since I can't run it on
the mac yet.
I will add them as needed when I bring up the mac menu.
Done.

+  submenu_horizontal_inset = 1;
+  arrow_to_edge_padding = 20;
+  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
+  arrow_width = rb.GetImageNamed(IDR_MENU_HIERARCHY_ARROW).Width();
+  gfx::ImageSkia check = GetMenuCheckImage(false);
+  check_height = check.height();
+  item_min_height = 29;
+  separator_spacing_height = 7;
+  separator_lower_height = 8;
+  separator_upper_height = 8;
+  label_to_arrow_padding = 20;
+  label_to_minor_text_padding = 20;
+  always_use_icon_to_label_padding = true;
+  align_arrow_and_shortcut = true;
+  offset_context_menus = true;
+  corner_radius = 2;
+}
+
+// static
+const MenuConfig& MenuConfig::instance(const ui::NativeTheme* theme) {
+  CR_DEFINE_STATIC_LOCAL(MenuConfig,
+                         mac_instance,
+                         (theme ? theme : ui::NativeTheme::instance()));
+  return mac_instance;
 }
 
 }  // namespace views