[CSS Shapes] large corner radius combined with 0 radius does not wrap properly

Source/core/rendering/shapes/BoxShape.cpp

 /*
  * Copyright (C) 2013 Adobe Systems Incorporated. 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.
@@ skipping 52 matching lines @@
     const FloatRect& rect = marginBounds.rect();
 
     if (!marginBounds.isRounded()) {
         result.append(LineSegment(marginBounds.rect().x(), marginBounds.rect().maxX()));
         return;
     }
 
     float topCornerMaxY = std::max<float>(marginBounds.topLeftCorner().maxY(), marginBounds.topRightCorner().maxY());
     float bottomCornerMinY = std::min<float>(marginBounds.bottomLeftCorner().y(), marginBounds.bottomRightCorner().y());
 
-    if (y1 <= topCornerMaxY && y2 >= bottomCornerMinY) {
+    if (topCornerMaxY <= bottomCornerMinY && y1 <= topCornerMaxY && y2 >= bottomCornerMinY) {
         result.append(LineSegment(rect.x(), rect.maxX()));
         return;
     }
 
     float x1 = rect.maxX();
     float x2 = rect.x();
     float minXIntercept;
     float maxXIntercept;
 
+    if (y1 <= marginBounds.topLeftCorner().maxY() && y2 >= marginBounds.bottomLeftCorner().y())
+        x1 = rect.x();
+
+    if (y1 <= marginBounds.topRightCorner().maxY() && y2 >= marginBounds.bottomRightCorner().y())
+        x2 = rect.maxX();
+
     if (marginBounds.xInterceptsAtY(y1, minXIntercept, maxXIntercept)) {
         x1 = std::min<float>(x1, minXIntercept);
         x2 = std::max<float>(x2, maxXIntercept);
     }
 
     if (marginBounds.xInterceptsAtY(y2, minXIntercept, maxXIntercept)) {
         x1 = std::min<float>(x1, minXIntercept);
         x2 = std::max<float>(x2, maxXIntercept);
     }
 
     ASSERT(x2 >= x1);
     result.append(LineSegment(x1, x2));
 }
 
 } // namespace WebCore