Fix int overflow in window.moveBy

third_party/WebKit/Source/platform/geometry/IntRect.h

 /*
  * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 74 matching lines @@
 
     bool isEmpty() const { return m_size.isEmpty(); }
 
     // NOTE: The result is rounded to integer values, and thus may be not the exact
     // center point.
     IntPoint center() const { return IntPoint(x() + width() / 2, y() + height() / 2); }
 
     void move(const IntSize& size) { m_location += size; }
     void moveBy(const IntPoint& offset) { m_location.move(offset.x(), offset.y()); }
     void move(int dx, int dy) { m_location.move(dx, dy); }
+    void saturatedMove(int dx, int dy) { m_location.saturatedMove(dx, dy); }
 
     void expand(const IntSize& size) { m_size += size; }
     void expand(int dw, int dh) { m_size.expand(dw, dh); }
     void expand(const IntRectOutsets& outsets)
     {
         m_location.move(-outsets.left(), -outsets.top());
         m_size.expand(outsets.left() + outsets.right(), outsets.top() + outsets.bottom());
     }
 
     void contract(const IntSize& size) { m_size -= size; }
@@ skipping 129 matching lines @@
 
 // Redeclared here to avoid ODR issues.
 // See platform/testing/GeometryPrinters.h.
 void PrintTo(const IntRect&, std::ostream*);
 
 } // namespace blink
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::IntRect);
 
 #endif // IntRect_h