Fix under-invalidation on SVG shape/image resize in subpixels

third_party/WebKit/Source/core/layout/svg/LayoutSVGShape.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2005, 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
  * Copyright (C) 2011 Renata Hodovan <reni@webkit.org>
  * Copyright (C) 2011 University of Szeged
@@ skipping 166 matching lines @@
 
   // Invalidate all resources of this client if our layout changed.
   if (everHadLayout() && selfNeedsLayout())
     SVGResourcesCache::clientLayoutChanged(this);
 
   bool updateParentBoundaries = false;
   // updateShapeFromElement() also updates the object & stroke bounds - which
   // feeds into the paint invalidation rect - so we need to call it for both
   // the shape-update and the bounds-update flag, since .
   if (m_needsShapeUpdate || m_needsBoundariesUpdate) {
+    FloatRect oldObjectBoundingBox = objectBoundingBox();
     updateShapeFromElement();
+    if (oldObjectBoundingBox != objectBoundingBox())
+      setShouldDoFullPaintInvalidation();
     m_needsShapeUpdate = false;
 
     m_paintInvalidationBoundingBox = strokeBoundingBox();
     SVGLayoutSupport::intersectPaintInvalidationRectWithResources(
         this, m_paintInvalidationBoundingBox);
     m_needsBoundariesUpdate = false;
 
     updateParentBoundaries = true;
   }
 
@@ skipping 131 matching lines @@
   return lengthContext.valueForLength(style()->svgStyle().strokeWidth());
 }
 
 LayoutSVGShapeRareData& LayoutSVGShape::ensureRareData() const {
   if (!m_rareData)
     m_rareData = wrapUnique(new LayoutSVGShapeRareData());
   return *m_rareData.get();
 }
 
 }  // namespace blink