[CSS Shapes] Image shape-outside with vertical gaps is handled incorrectly

Source/core/rendering/shapes/RasterShape.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 191 matching lines @@
 void RasterShapeIntervals::getExcludedIntervals(int y1, int y2, IntShapeIntervals& result) const
 {
     ASSERT(y2 >= y1);
 
     if (y2 < bounds().y() || y1 >= bounds().maxY())
         return;
 
     y1 = std::max(y1, bounds().y());
     y2 = std::min(y2, bounds().maxY());
 
-    for (int y = y1; y < y2;  y++) {
-        if (intervalsAt(y).isEmpty())
-            return;
-    }
-
     result = intervalsAt(y1);
     for (int y = y1 + 1; y < y2;  y++) {
         IntShapeIntervals intervals;
         IntShapeInterval::uniteShapeIntervals(result, intervalsAt(y), intervals);
         result.swap(intervals);
     }
 }
 
 PassOwnPtr<RasterShapeIntervals> RasterShapeIntervals::computeShapeMarginIntervals(unsigned margin) const
 {
@@ skipping 81 matching lines @@
 bool RasterShape::firstIncludedIntervalLogicalTop(LayoutUnit minLogicalIntervalTop, const LayoutSize& minLogicalIntervalSize, LayoutUnit& result) const
 {
     const RasterShapeIntervals& intervals = paddingIntervals();
     if (intervals.isEmpty())
         return false;
 
     return intervals.firstIncludedIntervalY(minLogicalIntervalTop.floor(), flooredIntSize(minLogicalIntervalSize), result);
 }
 
 } // namespace WebCore