[oilpan] Move EventHandler to the heap

Source/WebKit/chromium/src/ViewportAnchor.cpp

Index: Source/WebKit/chromium/src/ViewportAnchor.cpp
diff --git a/Source/WebKit/chromium/src/ViewportAnchor.cpp b/Source/WebKit/chromium/src/ViewportAnchor.cpp
index 03c377694ece1046cc666f2e05081a6794b61169..f3b4e7946cc55e33cf2bf2be5a58bc3627f2c137 100644
--- a/Source/WebKit/chromium/src/ViewportAnchor.cpp
+++ b/Source/WebKit/chromium/src/ViewportAnchor.cpp
@@ -50,7 +50,7 @@ int area(const RectType& rect) {
     return rect.width() * rect.height();
 }
 
-RESULT(Node) findNonEmptyAnchorNode(const IntPoint& point, const IntRect& viewRect, EventHandler* eventHandler)
+RESULT(Node) findNonEmptyAnchorNode(const IntPoint& point, const IntRect& viewRect, HANDLE_FORMAL(EventHandler) eventHandler)
 {
     HANDLE(Node) node = eventHandler->hitTestResultAtPoint(point).innerNode();
 
@@ -74,8 +74,8 @@ RESULT(Node) findNonEmptyAnchorNode(const IntPoint& point, const IntRect& viewRe
 
 } // namespace
 
-ViewportAnchor::ViewportAnchor(EventHandler* eventHandler)
-    : m_eventHandler(eventHandler) { }
+ViewportAnchor::ViewportAnchor(HANDLE_FORMAL(EventHandler) eventHandler)
+    : m_eventHandler(DOT_RAW(eventHandler)) { }
 
 void ViewportAnchor::setAnchor(const IntRect& viewRect, const FloatSize& anchorInViewCoords)
 {
@@ -96,7 +96,7 @@ void ViewportAnchor::setAnchor(const IntRect& viewRect, const FloatSize& anchorI
     anchorOffset.scale(anchorInViewCoords.width(), anchorInViewCoords.height());
     const FloatPoint anchorPoint = FloatPoint(viewRect.location()) + anchorOffset;
 
-    HANDLE(Node) node = findNonEmptyAnchorNode(flooredIntPoint(anchorPoint), viewRect, m_eventHandler);
+    HANDLE(Node) node = findNonEmptyAnchorNode(flooredIntPoint(anchorPoint), viewRect, adoptRawResult( m_eventHandler));
     if (!node)
         return;