Use LayoutRect during addFocusRingRects to avoid loss of precision

Source/core/rendering/RenderBlock.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. 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 303 matching lines @@
     void setDesiredColumnCountAndWidth(int, LayoutUnit);
 
 public:
     virtual void computeOverflow(LayoutUnit oldClientAfterEdge, bool = false);
 protected:
     virtual void addOverflowFromChildren();
     void addOverflowFromPositionedObjects();
     void addOverflowFromBlockChildren();
     void addVisualOverflowFromTheme();
 
-    virtual void addFocusRingRects(Vector<IntRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) const OVERRIDE;
+    virtual void addFocusRingRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer) const OVERRIDE;
 
     virtual void computeSelfHitTestRects(Vector<LayoutRect>&, const LayoutPoint& layerOffset) const OVERRIDE;
 
     void computeRegionRangeForBlock(RenderFlowThread*);
 
     void updateBlockChildDirtyBitsBeforeLayout(bool relayoutChildren, RenderBox*);
 
     virtual bool isInlineBlockOrInlineTable() const OVERRIDE FINAL { return isInline() && isReplaced(); }
 
     virtual void invalidateTreeIfNeeded(const PaintInvalidationState&) OVERRIDE;
@@ skipping 173 matching lines @@
     // FIXME: This is temporary as we move code that accesses block flow
     // member variables out of RenderBlock and into RenderBlockFlow.
     friend class RenderBlockFlow;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderBlock, isRenderBlock());
 
 } // namespace blink
 
 #endif // RenderBlock_h