Context menus should appear above the touch point if invoked by long press.

content/browser/web_contents/web_contents_impl.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 CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 387 matching lines @@
                                WebKit::WebPopupType popup_type) OVERRIDE;
   virtual void CreateNewFullscreenWidget(int route_id) OVERRIDE;
   virtual void ShowCreatedWindow(int route_id,
                                  WindowOpenDisposition disposition,
                                  const gfx::Rect& initial_pos,
                                  bool user_gesture) OVERRIDE;
   virtual void ShowCreatedWidget(int route_id,
                                  const gfx::Rect& initial_pos) OVERRIDE;
   virtual void ShowCreatedFullscreenWidget(int route_id) OVERRIDE;
   virtual void ShowContextMenu(
-      const content::ContextMenuParams& params) OVERRIDE;
+      const content::ContextMenuParams& params,
+      const content::ContextMenuEventType& type) OVERRIDE;
   virtual void RequestMediaAccessPermission(
       const content::MediaStreamRequest* request,
       const content::MediaResponseCallback& callback) OVERRIDE;
 
   // RenderWidgetHostDelegate --------------------------------------------------
 
   virtual bool PreHandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event,
       bool* is_keyboard_shortcut) OVERRIDE;
   virtual void HandleKeyboardEvent(
@@ skipping 399 matching lines @@
   content::NotificationRegistrar registrar_;
 
   // Used during IPC message dispatching so that the handlers can get a pointer
   // to the RVH through which the message was received.
   content::RenderViewHost* message_source_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsImpl);
 };
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_