Remove Downcasting RVContextMenuBase in ContextMenuDeleagate implementations.

content/public/common/context_menu_params.cc

 // Copyright (c) 2011 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 "content/public/common/context_menu_params.h"
 
 namespace content {
 
 const int32 CustomContextMenuContext::kCurrentRenderWidget = kint32max;
 
 CustomContextMenuContext::CustomContextMenuContext()
     : is_pepper_menu(false),
       request_id(0),
       render_widget_id(kCurrentRenderWidget) {
 }
 
 ContextMenuParams::ContextMenuParams()
     : media_type(blink::WebContextMenuData::MediaTypeNone),
       x(0),
       y(0),
+      screen_x(0),
+      screen_y(0),
       has_image_contents(true),
       media_flags(0),
       misspelling_hash(0),
       spellcheck_enabled(false),
       is_editable(false),
       writing_direction_default(
           blink::WebContextMenuData::CheckableMenuItemDisabled),
       writing_direction_left_to_right(
           blink::WebContextMenuData::CheckableMenuItemEnabled),
       writing_direction_right_to_left(
           blink::WebContextMenuData::CheckableMenuItemEnabled),
       edit_flags(0),
       referrer_policy(blink::WebReferrerPolicyDefault),
       source_type(ui::MENU_SOURCE_NONE) {
 }
 
 ContextMenuParams::~ContextMenuParams() {
 }
 
 }  // namespace content