Canvas2d: Implement rerouting event by hit region's control.

third_party/WebKit/Source/modules/canvas2d/TouchHitRegion.h

Index: third_party/WebKit/Source/modules/canvas2d/TouchHitRegion.h
diff --git a/third_party/WebKit/Source/modules/canvas2d/TouchHitRegion.h b/third_party/WebKit/Source/modules/canvas2d/TouchHitRegion.h
index 42eb2ec08c29c71cb56046a1148b90487dfd7a13..3d83209857b130fcb168a7453ff76eb38ad608a8 100644
--- a/third_party/WebKit/Source/modules/canvas2d/TouchHitRegion.h
+++ b/third_party/WebKit/Source/modules/canvas2d/TouchHitRegion.h
@@ -5,14 +5,14 @@
 #ifndef TouchHitRegion_h
 #define TouchHitRegion_h
 
-#include "modules/canvas2d/EventHitRegion.h"
 #include "wtf/Allocator.h"
+#include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Touch;
 
-class TouchHitRegion : public EventHitRegion {
+class TouchHitRegion {
     STATIC_ONLY(TouchHitRegion);
 public:
     static String region(Touch&);