[Win] Ship with Chromium's menu library.

I will hack it.

browser/ui/win/menu_wrapper.h

@@ -0,0 +1,76 @@
+// Copyright (c) 2013 GitHub, Inc. All rights reserved.
+// 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.
+
+#ifndef BROWSER_UI_WIN_MENU_WRAPPER_H_
+#define BROWSER_UI_WIN_MENU_WRAPPER_H_
+
+#include "ui/gfx/native_widget_types.h"
+
+namespace gfx {
+class Point;
+}
+
+namespace ui {
+class MenuModel;
+}
+
+namespace views {
+class MenuInsertionDelegateWin;
+class MenuListener;
+}
+
+namespace atom {
+
+// An interface that wraps an object that implements a menu.
+class MenuWrapper {
+ public:
+  // All of the possible actions that can result from RunMenuAt.
+  enum MenuAction {
+    MENU_ACTION_NONE,      // Menu cancelled, or never opened.
+    MENU_ACTION_SELECTED,  // An item was selected.
+    MENU_ACTION_PREVIOUS,  // User wants to navigate to the previous menu.
+    MENU_ACTION_NEXT,      // User wants to navigate to the next menu.
+  };
+
+  virtual ~MenuWrapper() {}
+
+  // Creates the appropriate instance of this wrapper for the current platform.
+  static MenuWrapper* CreateWrapper(ui::MenuModel* model);
+
+  // Runs the menu at the specified point. This blocks until done.
+  virtual void RunMenuAt(const gfx::Point& point, int alignment) = 0;
+
+  // Cancels the active menu.
+  virtual void CancelMenu() = 0;
+
+  // Called when the model supplying data to this menu has changed, and the menu
+  // must be rebuilt.
+  virtual void Rebuild(views::MenuInsertionDelegateWin* delegate) = 0;
+
+  // Called when the states of the items in the menu must be updated from the
+  // model.
+  virtual void UpdateStates() = 0;
+
+  // Retrieve a native menu handle.
+  virtual HMENU GetNativeMenu() const = 0;
+
+  // Get the result of the last call to RunMenuAt to determine whether an
+  // item was selected, the user navigated to a next or previous menu, or
+  // nothing.
+  virtual MenuAction GetMenuAction() const = 0;
+
+  // Add a listener to receive a callback when the menu opens.
+  virtual void AddMenuListener(views::MenuListener* listener) = 0;
+
+  // Remove a menu listener.
+  virtual void RemoveMenuListener(views::MenuListener* listener) = 0;
+
+  // Sets the minimum width of the menu.
+  virtual void SetMinimumWidth(int width) = 0;
+};
+
+}  // namespace atom
+
+#endif  // BROWSER_UI_WIN_MENU_WRAPPER_H_