Separate mouse transition events from pointerevent

third_party/WebKit/Source/core/input/EventHandler.cpp

Index: third_party/WebKit/Source/core/input/EventHandler.cpp
diff --git a/third_party/WebKit/Source/core/input/EventHandler.cpp b/third_party/WebKit/Source/core/input/EventHandler.cpp
index 645d51be8477559971abd6939f700eb84dfff90a..7301ed12126efff7ade5e5b8c720ee1577cf9dba 100644
--- a/third_party/WebKit/Source/core/input/EventHandler.cpp
+++ b/third_party/WebKit/Source/core/input/EventHandler.cpp
@@ -1256,7 +1256,7 @@ WebInputEventResult EventHandler::handleMouseMoveOrLeaveEvent(const PlatformMous
 
     if (newSubframe) {
         // Update over/out state before passing the event to the subframe.
-        updateMouseEventTargetNode(mev.innerNode(), mev.event());
+        updateMouseEventTargetNode(mev.innerNode(), mev.event(), true);
 
         // Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target
         // node to be detached from its FrameView, in which case the event should not be passed.
@@ -1590,7 +1590,8 @@ MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestReques
     return m_frame->document()->prepareMouseEvent(request, contentPointFromRootFrame(m_frame, mev.position()), mev);
 }
 
-void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent)
+void EventHandler::updateMouseEventTargetNode(Node* targetNode,
+    const PlatformMouseEvent& mouseEvent, bool setPointerPosition)
 {
     Node* result = targetNode;
 
@@ -1639,7 +1640,8 @@ void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMo
     }
 
     m_pointerEventManager.sendNodeTransitionEvents(lastNodeUnderMouse,
-        m_nodeUnderMouse, mouseEvent, m_frame->document()->domWindow());
+        m_nodeUnderMouse, mouseEvent, m_frame->document()->domWindow(),
+        setPointerPosition);
 }
 
 WebInputEventResult EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, int clickCount, const PlatformMouseEvent& mouseEvent)
@@ -1681,8 +1683,6 @@ WebInputEventResult EventHandler::updatePointerTargetAndDispatchEvents(const Ato
         || mouseEventType == EventTypeNames::mouseup);
 
     updateMouseEventTargetNode(targetNode, mouseEvent);
-    if (!m_nodeUnderMouse)
-        return WebInputEventResult::NotHandled;
 
     return m_pointerEventManager.sendMousePointerEvent(
         m_nodeUnderMouse, mouseEventType, clickCount, mouseEvent, nullptr,