Add fillRule option for hit regions on canvas2d.

Source/core/html/canvas/HitRegion.h

Index: Source/core/html/canvas/HitRegion.h
diff --git a/Source/core/html/canvas/HitRegion.h b/Source/core/html/canvas/HitRegion.h
index 3d61fad714c1800cf6f03422420ca0e9f70dad12..8108325fea18c9e4299699c4655cfd8fb6b6b624 100644
--- a/Source/core/html/canvas/HitRegion.h
+++ b/Source/core/html/canvas/HitRegion.h
@@ -24,6 +24,7 @@ public:
     String id;
     RefPtrWillBeMember<Element> control;
     Path path;
+    WindRule fillRule;
 };
 
 class HitRegion FINAL : public RefCountedWillBeGarbageCollectedFinalized<HitRegion> {
@@ -43,6 +44,7 @@ public:
     const String& id() const { return m_id; }
     const Path& path() const { return m_path; }
     Element* control() const { return m_control.get(); }
+    WindRule fillRule() const { return m_fillRule; }
 
     void trace(Visitor*);
 
@@ -52,6 +54,7 @@ private:
     String m_id;
     RefPtrWillBeMember<Element> m_control;
     Path m_path;
+    WindRule m_fillRule;
 };
 
 class HitRegionManager FINAL : public NoBaseWillBeGarbageCollected<HitRegionManager> {