[oilpan] Move EventHandler to the heap

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index 09a9245b32e5bfe8025e4b12bc9ee988429905c1..1ffe4a11f6f758d063d67f8eaec353a72147b1b0 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -111,6 +111,8 @@
 
 namespace WebCore {
 
+DEFINE_GC_MAP(EventHandler);
+
 using namespace HTMLNames;
 
 // The link drag hysteresis is much larger than the others because there
@@ -361,7 +363,7 @@ void EventHandler::clear()
     m_capturingMouseEventsNode = nullptr;
     m_latchedWheelEventNode = nullptr;
     m_previousWheelScrolledNode = nullptr;
-    m_originatingTouchPointTargets->clear();
+    m_originatingTouchPointTargets.clear();
     m_originatingTouchPointDocument.clear();
     m_originatingTouchPointTargetKey = 0;
     m_scrollGestureHandlingNode = nullptr;
@@ -3772,7 +3774,7 @@ bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
                 continue;
             if (!doc->hasTouchEventHandlers())
                 continue;
-            m_originatingTouchPointTargets->set(touchPointTargetKey, node);
+            m_originatingTouchPointTargets.set(touchPointTargetKey, node);
             touchTarget = node;
         } else if (pointState == PlatformTouchPoint::TouchReleased || pointState == PlatformTouchPoint::TouchCancelled) {
             // We only perform a hittest on release or cancel to unset :active or :hover state.
@@ -3785,10 +3787,10 @@ bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
             }
             // The target should be the original target for this touch, so get it from the hashmap. As it's a release or cancel
             // we also remove it from the map.
-            touchTarget = m_originatingTouchPointTargets->take(touchPointTargetKey);
+            touchTarget = m_originatingTouchPointTargets.take(touchPointTargetKey);
         } else
             // No hittest is performed on move or stationary, since the target is not allowed to change anyway.
-            touchTarget = m_originatingTouchPointTargets->get(touchPointTargetKey);
+            touchTarget = m_originatingTouchPointTargets.get(touchPointTargetKey);
 
         if (!touchTarget)
             continue;
@@ -4009,4 +4011,21 @@ unsigned EventHandler::accessKeyModifiers()
 #endif
 }
 
+void EventHandler::accept(Visitor* visitor) const
+{
+    visitor->visit(m_mousePressNode);
+    visitor->visit(m_capturingMouseEventsNode);
+    visitor->visit(m_nodeUnderMouse);
+    visitor->visit(m_lastNodeUnderMouse);
+    visitor->visit(m_clickNode);
+    visitor->visit(m_dragTarget);
+    visitor->visit(m_frameSetBeingResized);
+    visitor->visit(m_latchedWheelEventNode);
+    visitor->visit(m_previousWheelScrolledNode);
+    visitor->visit(m_originatingTouchPointDocument);
+    visitor->visit(m_scrollGestureHandlingNode);
+    visitor->visit(m_previousGestureScrolledNode);
+    visitor->visit(m_originatingTouchPointTargets);
+}
+
 } // namespace WebCore