Fix int overflow in window.moveBy

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1215 matching lines @@
 void LocalDOMWindow::moveBy(int x, int y) const
 {
     if (!frame() || !frame()->isMainFrame())
         return;
 
     FrameHost* host = frame()->host();
     if (!host)
         return;
 
     IntRect windowRect = host->chromeClient().rootWindowRect();
-    windowRect.move(x, y);
+    windowRect.saturatedMove(x, y);
     // Security check (the spec talks about UniversalBrowserWrite to disable this check...)
     host->chromeClient().setWindowRectWithAdjustment(windowRect, *frame());
 }
 
 void LocalDOMWindow::moveTo(int x, int y) const
 {
     if (!frame() || !frame()->isMainFrame())
         return;
 
     FrameHost* host = frame()->host();
@@ skipping 295 matching lines @@
 {
     // If the LocalDOMWindow still has a frame reference, that frame must point
     // back to this LocalDOMWindow: otherwise, it's easy to get into a situation
     // where script execution leaks between different LocalDOMWindows.
     if (m_frameObserver->frame())
         ASSERT_WITH_SECURITY_IMPLICATION(m_frameObserver->frame()->domWindow() == this);
     return m_frameObserver->frame();
 }
 
 } // namespace blink