Move have_wheel_event_handlers to WebLayerTreeView.

cc/trees/draw_property_utils.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/draw_property_utils.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 294 matching lines @@
   // case where we may animate to a non-singular transform and wish to
   // pre-raster.
   if (!HasInvertibleOrAnimatedTransform(layer))
     return true;
 
   // When we need to do a readback/copy of a layer's output, we can not skip
   // it or any of its ancestors.
   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
   // in turn depends on layer's clip rect that is computed while computing
   // visible rects.
   if (layer->layer_or_descendant_has_input_handler())
     return false;
 
   // If the layer is not drawn, then skip it and its subtree.
   if (!layer_is_drawn)
@@ skipping 850 matching lines @@
 
 void UpdateElasticOverscrollInPropertyTrees(
     PropertyTrees* property_trees,
     const Layer* overscroll_elasticity_layer,
     const gfx::Vector2dF& elastic_overscroll) {
   UpdateElasticOverscrollInPropertyTreesInternal(
       property_trees, overscroll_elasticity_layer, elastic_overscroll);
 }
 
 }  // namespace cc