Add ContextMenuSourceType to views::ContextMenuController::ShowContextMenuForView.

ui/views/controls/button/button_dropdown.cc

 // 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.
 
 #include "ui/views/controls/button/button_dropdown.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 113 matching lines @@
   ImageButton::OnGestureEvent(event);
 }
 
 void ButtonDropDown::GetAccessibleState(ui::AccessibleViewState* state) {
   CustomButton::GetAccessibleState(state);
   state->role = ui::AccessibilityTypes::ROLE_BUTTONDROPDOWN;
   state->default_action = l10n_util::GetStringUTF16(IDS_APP_ACCACTION_PRESS);
   state->state = ui::AccessibilityTypes::STATE_HASPOPUP;
 }
 
-void ButtonDropDown::ShowContextMenuForView(View* source,
-                                            const gfx::Point& point) {
+void ButtonDropDown::ShowContextMenuForView(
+    View* source,
+    const gfx::Point& point,
+    ui::ContextMenuSourceType source_type) {
   if (!enabled())
     return;
 
   show_menu_factory_.InvalidateWeakPtrs();
   ShowDropDownMenu();
 }
 
 bool ButtonDropDown::ShouldEnterPushedState(const ui::Event& event) {
   // Enter PUSHED state on press with Left or Right mouse button or on taps.
   // Remain in this state while the context menu is open.
@@ skipping 73 matching lines @@
     SetState(STATE_NORMAL);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 //
 // ButtonDropDown - Accessibility
 //
 ////////////////////////////////////////////////////////////////////////////////
 
 }  // namespace views