Add the button style for combobox

ui/views/controls/menu/menu_runner_core.h

Index: ui/views/controls/menu/menu_runner_core.h
diff --git a/ui/views/controls/menu/menu_runner_core.h b/ui/views/controls/menu/menu_runner_core.h
new file mode 100644
index 0000000000000000000000000000000000000000..93bdb95590864754f3129bf13bb570bf9cc77d28
--- /dev/null
+++ b/ui/views/controls/menu/menu_runner_core.h
@@ -0,0 +1,30 @@
+// Copyright 2013 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_CORE_H_
+#define UI_VIEWS_CONTROLS_MENU_MENU_RUNNER_CORE_H_
+
+#include "base/basictypes.h"
+#include "ui/views/controls/menu/menu_item_view.h"
+
+namespace views {
+
+class MenuButton;
+class Widget;
+
+// An interface which defines RunMenuAt.
+class VIEWS_EXPORT MenuRunnerCore {

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

How about MenuRunnerImpl?

[hajimehoshi, 2013/12/09 14:58:31]

(internal::)MenuRunnerImpl already exists.

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

Done. (MenuRunnerHandler)

+ public:
+  virtual MenuRunner::RunResult RunMenuAt(Widget* parent,
+                                          MenuButton* button,
+                                          const gfx::Rect& bounds,
+                                          MenuItemView::AnchorPosition anchor,
+                                          ui::MenuSourceType source_type,
+                                          int32 types) = 0;
+  virtual ~MenuRunnerCore() {}
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_CONTROLS_MENU_MENU_RUNNER_CORE_H_