Communicate whether passive event listeners exist to cc.

third_party/WebKit/public/platform/WebLayerTreeView.h

Index: third_party/WebKit/public/platform/WebLayerTreeView.h
diff --git a/third_party/WebKit/public/platform/WebLayerTreeView.h b/third_party/WebKit/public/platform/WebLayerTreeView.h
index fc9688d5c5474c49aa034848fac5949f3de70bd4..c21285d1528e2d88e21f52939b77c36f83122e6b 100644
--- a/third_party/WebKit/public/platform/WebLayerTreeView.h
+++ b/third_party/WebKit/public/platform/WebLayerTreeView.h
@@ -28,6 +28,7 @@
 
 #include "WebColor.h"
 #include "WebCommon.h"
+#include "WebEventListenerProperties.h"
 #include "WebFloatPoint.h"
 #include "WebNonCopyable.h"
 #include "WebPrivateOwnPtr.h"
@@ -142,12 +143,12 @@ public:
     virtual void clearSelection() { }
 
     // Input properties ---------------------------------------------------
-    virtual void setHaveWheelEventHandlers(bool) { };
+    virtual void setEventListenerProperties(WebEventListenerClass, WebEventListenerProperties) { };
     virtual void setHaveScrollEventHandlers(bool) { };
 
     // Debugging / dangerous ---------------------------------------------
 
-    virtual bool haveWheelEventHandlers() const { return false; };
+    virtual WebEventListenerProperties eventListenerProperties(WebEventListenerClass) const { return WebEventListenerProperties::Nothing; };
     virtual bool haveScrollEventHandlers() const { return false; };
 
     virtual int layerTreeId() const { return 0; }