Add the button style for combobox

ui/views/controls/menu/menu_runner.h

 // 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 UI_VIEWS_CONTROLS_MENU_MENU_RUNNER_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_RUNNER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/views/controls/menu/menu_item_view.h"
 
 namespace ui {
 class MenuModel;
 }
 
 namespace views {
 
 class MenuButton;
 class MenuModelAdapter;
+class MenuRunnerCore;
 class Widget;
 
 namespace internal {
 class DisplayChangeListener;
 class MenuRunnerImpl;
 }
 
 // MenuRunner is responsible for showing (running) the menu and additionally
 // owning the MenuItemView. RunMenuAt() runs a nested message loop. It is safe
 // to delete MenuRunner at any point, but MenuRunner internally only deletes the
@@ skipping 73 matching lines @@
 
   // Returns true if we're in a nested message loop running the menu.
   bool IsRunning() const;
 
   // Hides and cancels the menu. This does nothing if the menu is not open.
   void Cancel();
 
   // Returns the time from the event which closed the menu - or 0.
   base::TimeDelta closing_event_time() const;
 
+  // Sets an implementation of RunMenuAt. This is intended to be used at test.
+  void set_runner_core(MenuRunnerCore* runner_core) {

[sky, 2013/12/09 14:54:04]

Make this private and only settable by way of a test friend api, eg
MenuRunnerTestApi or MenuRunnerTestHelper. Said class is only compiled for test
code. Also, can this be a scoped_ptr?

[hajimehoshi, 2013/12/10 06:04:25]

Done.

+    runner_core_ = runner_core;
+  }
+
  private:
   scoped_ptr<MenuModelAdapter> menu_model_adapter_;
 
   internal::MenuRunnerImpl* holder_;
 
+  // An implementation of RunMenuAt. This is usually NULL and ignored. If this
+  // is not NULL, this implementation will be used.
+  MenuRunnerCore* runner_core_;
+
   scoped_ptr<internal::DisplayChangeListener> display_change_listener_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuRunner);
 };
 
 namespace internal {
 
 // DisplayChangeListener is intended to listen for changes in the display size
 // and cancel the menu. DisplayChangeListener is created when the menu is
 // shown.
 class DisplayChangeListener {
  public:
   virtual ~DisplayChangeListener() {}
 
   // Creates the platform specified DisplayChangeListener, or NULL if there
   // isn't one. Caller owns the returned value.
   static DisplayChangeListener* Create(Widget* parent,
                                        MenuRunner* runner);
 
  protected:
   DisplayChangeListener() {}
 };
 
 }
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_RUNNER_H_