Add fillRule option for hit regions on canvas2d.

Source/core/html/canvas/CanvasRenderingContext2D.cpp

Index: Source/core/html/canvas/CanvasRenderingContext2D.cpp
diff --git a/Source/core/html/canvas/CanvasRenderingContext2D.cpp b/Source/core/html/canvas/CanvasRenderingContext2D.cpp
index de7a380d673a8cd3a323a79cf499aaecd6e609af..38ec8f4eb74c5f76d1448efa652ef72b1ae6b945 100644
--- a/Source/core/html/canvas/CanvasRenderingContext2D.cpp
+++ b/Source/core/html/canvas/CanvasRenderingContext2D.cpp
@@ -2396,6 +2396,14 @@ void CanvasRenderingContext2D::addHitRegion(const Dictionary& options, Exception
     }
 
     passOptions.path = specifiedPath;
+
+    String fillRuleString;
+    options.getWithUndefinedOrNullCheck("fillRule", fillRuleString);
+    if (fillRuleString.isEmpty() || fillRuleString != "evenodd")
+        passOptions.fillRule = RULE_NONZERO;
+    else
+        passOptions.fillRule = RULE_EVENODD;
+
     addHitRegionInternal(passOptions, exceptionState);
 }