Migrate wheel events to EventHandlerRegistry

Source/web/WebViewImpl.cpp

Index: Source/web/WebViewImpl.cpp
diff --git a/Source/web/WebViewImpl.cpp b/Source/web/WebViewImpl.cpp
index 1a4e1347d9ad6369c6192253ed2a42b385cbc654..aa1a9cb6b2584883700da33702b4a45d86a302b5 100644
--- a/Source/web/WebViewImpl.cpp
+++ b/Source/web/WebViewImpl.cpp
@@ -39,13 +39,13 @@
 #include "core/dom/Document.h"
 #include "core/dom/DocumentMarkerController.h"
 #include "core/dom/Text.h"
-#include "core/dom/WheelController.h"
 #include "core/editing/Editor.h"
 #include "core/editing/FrameSelection.h"
 #include "core/editing/InputMethodController.h"
 #include "core/editing/TextIterator.h"
 #include "core/events/KeyboardEvent.h"
 #include "core/events/WheelEvent.h"
+#include "core/frame/EventHandlerRegistry.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
@@ -1476,18 +1476,14 @@ void WebViewImpl::popupOpened(PopupContainer* popupContainer)
 {
     ASSERT(!m_selectPopup);
     m_selectPopup = popupContainer;
-    ASSERT(mainFrameImpl()->frame()->document());
-    Document& document = *mainFrameImpl()->frame()->document();
-    WheelController::from(document)->didAddWheelEventHandler(document);
+    page()->frameHost().eventHandlerRegistry().didAddExternalEventHandler(EventTypeNames::wheel);
 }
 
 void WebViewImpl::popupClosed(PopupContainer* popupContainer)
 {
     ASSERT(m_selectPopup);
     m_selectPopup = nullptr;
-    ASSERT(mainFrameImpl()->frame()->document());
-    Document& document = *mainFrameImpl()->frame()->document();
-    WheelController::from(document)->didRemoveWheelEventHandler(document);
+    page()->frameHost().eventHandlerRegistry().didRemoveExternalEventHandler(EventTypeNames::wheel);
 }
 
 PagePopup* WebViewImpl::openPagePopup(PagePopupClient* client, const IntRect& originBoundsInRootView)