Disallow cast/implicit conversion from LayoutUnit to int/unsigned

third_party/WebKit/Source/core/layout/compositing/CompositedLayerMapping.cpp

 /*
  * Copyright (C) 2009, 2010, 2011 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 976 matching lines @@
     m_scrollingLayer->setOffsetFromLayoutObject(-toIntSize(overflowClipRect.location()));
 
     if (m_childClippingMaskLayer && !layoutObject()->style()->clipPath()) {
         m_childClippingMaskLayer->setPosition(m_scrollingLayer->position());
         m_childClippingMaskLayer->setSize(m_scrollingLayer->size());
         m_childClippingMaskLayer->setOffsetFromLayoutObject(toIntSize(overflowClipRect.location()));
     }
 
     bool overflowClipRectOffsetChanged = oldScrollingLayerOffset != m_scrollingLayer->offsetFromLayoutObject();
 
-    IntSize scrollSize(layoutBox->scrollWidth(), layoutBox->scrollHeight());
+    IntSize scrollSize(layoutBox->scrollWidth().toInt(), layoutBox->scrollHeight().toInt());
     if (scrollSize != m_scrollingContentsLayer->size() || overflowClipRectOffsetChanged)
         m_scrollingContentsLayer->setNeedsDisplay();
 
     DoubleSize scrollingContentsOffset(overflowClipRect.location().x() - adjustedScrollOffset.width(), overflowClipRect.location().y() - adjustedScrollOffset.height());
     // The scroll offset change is compared using floating point so that fractional scroll offset
     // change can be propagated to compositor.
     if (scrollingContentsOffset != m_scrollingContentsOffset || scrollSize != m_scrollingContentsLayer->size()) {
         bool coordinatorHandlesOffset = compositor()->scrollingLayerDidChange(&m_owningLayer);
         m_scrollingContentsLayer->setPosition(coordinatorHandlesOffset ? FloatPoint() : FloatPoint(-toFloatSize(adjustedScrollOffset)));
     }
@@ skipping 1685 matching lines @@
     } else if (graphicsLayer == m_scrollingContentsLayer.get()) {
         name = "Scrolling Contents Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink