Move have_wheel_event_handlers to WebLayerTreeView.

cc/trees/draw_property_utils.cc

Index: cc/trees/draw_property_utils.cc
diff --git a/cc/trees/draw_property_utils.cc b/cc/trees/draw_property_utils.cc
index fa522368a32906f731ec11a2e986cfad063a7587..3c3b02ffa812d91102b5bc340d83277968cad51a 100644
--- a/cc/trees/draw_property_utils.cc
+++ b/cc/trees/draw_property_utils.cc
@@ -312,7 +312,7 @@ static inline bool SubtreeShouldBeSkipped(LayerImpl* layer,
   if (layer->num_copy_requests_in_target_subtree() > 0)
     return false;
 
-  // We cannot skip the the subtree if a descendant has a wheel or touch handler
+  // We cannot skip the the subtree if a descendant has a touch handler
   // or the hit testing code will break (it requires fresh transforms, etc).
   // Though we don't need visible rect for hit testing, we need render surface's
   // drawable content rect which depends on layer's drawable content rect which