Sandbox should prevent 'execCommand("print", ...)'.

third_party/WebKit/Source/core/page/ChromeClient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple, Inc. All rights
  * reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 185 matching lines @@
   virtual float clampPageScaleFactorToLimits(float scale) const {
     return scale;
   }
   virtual void mainFrameScrollOffsetChanged() const {}
   virtual void layoutUpdated(LocalFrame*) const {}
 
   void mouseDidMoveOverElement(LocalFrame&, const HitTestResult&);
   virtual void setToolTip(LocalFrame&, const String&, TextDirection) = 0;
   void clearToolTip(LocalFrame&);
 
-  void print(LocalFrame*);
+  bool print(LocalFrame*);
 
   virtual void annotatedRegionsChanged() = 0;
 
   virtual ColorChooser* openColorChooser(LocalFrame*,
                                          ColorChooserClient*,
                                          const Color&) = 0;
 
   // This function is used for:
   //  - Mandatory date/time choosers if !ENABLE(INPUT_MULTIPLE_FIELDS_UI)
   //  - Date/time choosers for types for which
@@ skipping 142 matching lines @@
 
   LayoutPoint m_lastToolTipPoint;
   String m_lastToolTipText;
 
   FRIEND_TEST_ALL_PREFIXES(ChromeClientTest, SetToolTipFlood);
 };
 
 }  // namespace blink
 
 #endif  // ChromeClient_h