Migrate wheel events to EventHandlerRegistry

Source/core/testing/Internals.cpp

Index: Source/core/testing/Internals.cpp
diff --git a/Source/core/testing/Internals.cpp b/Source/core/testing/Internals.cpp
index 7624d3559af7110298088b32ffbb7c45a4b3c7b2..54604b5ab3ae2fac0a8ccd35b5f9b4ce700373c5 100644
--- a/Source/core/testing/Internals.cpp
+++ b/Source/core/testing/Internals.cpp
@@ -64,7 +64,6 @@
 #include "core/dom/StaticNodeList.h"
 #include "core/dom/TreeScope.h"
 #include "core/dom/ViewportDescription.h"
-#include "core/dom/WheelController.h"
 #include "core/dom/shadow/ComposedTreeWalker.h"
 #include "core/dom/shadow/ElementShadow.h"
 #include "core/dom/shadow/SelectRuleFeatureSet.h"
@@ -1253,7 +1252,7 @@ static unsigned eventHandlerCount(Document& document, EventHandlerRegistry::Even
     if (!document.frameHost())
         return 0;
     EventHandlerRegistry* registry = &document.frameHost()->eventHandlerRegistry();
-    unsigned count = 0;
+    unsigned count = registry->externalEventHandlerCount(handlerClass);
     const EventTargetSet* targets = registry->eventHandlerTargets(handlerClass);
     if (targets) {
         for (EventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter)
@@ -1269,7 +1268,7 @@ unsigned Internals::wheelEventHandlerCount(Document* document, ExceptionState& e
         return 0;
     }
 
-    return WheelController::from(*document)->wheelEventHandlerCount();
+    return eventHandlerCount(*document, EventHandlerRegistry::WheelEvent);
 }
 
 unsigned Internals::scrollEventHandlerCount(Document* document, ExceptionState& exceptionState)