Fix ellipse hit testing in the non-circle case

Source/core/rendering/svg/RenderSVGShape.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 38 matching lines @@
     , m_needsTransformUpdate(true) // Default is true, so we grab a AffineTransform object once from SVGGraphicsElement.
 {
 }
 
 RenderSVGShape::~RenderSVGShape()
 {
 }
 
 void RenderSVGShape::updateShapeFromElement()
 {
-    m_path.clear();
+    clearPath();
     m_path = adoptPtr(new Path);
     ASSERT(RenderSVGShape::isShapeEmpty());
 
     updatePathFromGraphicsElement(toSVGGraphicsElement(element()), path());
     processMarkerPositions();
 
     m_fillBoundingBox = calculateObjectBoundingBox();
     m_hitTestStrokeBoundingBox = calculateHitTestStrokeBoundingBox();
     m_strokeBoundingBox = style()->svgStyle().hasStroke() ? m_hitTestStrokeBoundingBox : m_fillBoundingBox;
 }
@@ skipping 187 matching lines @@
     SVGRenderSupport::intersectPaintInvalidationRectWithResources(this, m_paintInvalidationBoundingBox);
 }
 
 float RenderSVGShape::strokeWidth() const
 {
     SVGLengthContext lengthContext(element());
     return style()->svgStyle().strokeWidth()->value(lengthContext);
 }
 
 }