Add ContextMenuSourceType to views::ContextMenuController::ShowContextMenuForView.

ui/views/controls/combobox/native_combobox_views.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_COMBOBOX_NATIVE_COMBOBOX_VIEWS_H_
 #define UI_VIEWS_CONTROLS_COMBOBOX_NATIVE_COMBOBOX_VIEWS_H_
 
 #include "ui/views/controls/combobox/native_combobox_wrapper.h"
 #include "ui/views/controls/menu/menu_delegate.h"
 #include "ui/views/view.h"
@@ skipping 55 matching lines @@
 
  private:
   // Given bounds within our View, this helper routine mirrors the bounds if
   // necessary.
   void AdjustBoundsForRTLUI(gfx::Rect* rect) const;
 
   // Draw the selected value of the drop down list
   void PaintText(gfx::Canvas* canvas);
 
   // Show the drop down list
-  void ShowDropDownMenu();
+  void ShowDropDownMenu(ui::MenuSourceType source_type);
 
   // The parent combobox, the owner of this object.
   Combobox* combobox_;
 
   // The reference to the border class. The object is owned by View::border_.
   FocusableBorder* text_border_;
 
   // The disclosure arrow next to the currently selected item from the list.
   const gfx::ImageSkia* disclosure_arrow_;
 
@@ skipping 10 matching lines @@
   // The maximum dimensions of the content in the dropdown
   int content_width_;
   int content_height_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeComboboxViews);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_COMBOBOX_NATIVE_COMBOBOX_VIEWS_H_