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

content/browser/web_contents/interstitial_page_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_INTERSTITIAL_PAGE_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_INTERSTITIAL_PAGE_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process_util.h"
@@ skipping 95 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::ContextMenuSourceType& type) OVERRIDE;
 
   // RenderWidgetHostDelegate implementation:
   virtual bool PreHandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event,
       bool* is_keyboard_shortcut) OVERRIDE;
   virtual void HandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event) OVERRIDE;
 
   bool enabled() const { return enabled_; }
   content::WebContents* web_contents() const;
@@ skipping 81 matching lines @@
   mutable content::RendererPreferences renderer_preferences_;
 
   bool create_view_;
 
   scoped_ptr<content::InterstitialPageDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(InterstitialPageImpl);
 };
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_INTERSTITIAL_PAGE_IMPL_H_