Move have_wheel_event_handlers to WebLayerTreeView.

cc/blink/web_layer_impl.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/blink/web_layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 309 matching lines @@
 }
 
 bool WebLayerImpl::userScrollableHorizontal() const {
   return layer_->user_scrollable_horizontal();
 }
 
 bool WebLayerImpl::userScrollableVertical() const {
   return layer_->user_scrollable_vertical();
 }
 
-void WebLayerImpl::setHaveWheelEventHandlers(bool have_wheel_event_handlers) {
-  layer_->SetHaveWheelEventHandlers(have_wheel_event_handlers);
-}
-
 bool WebLayerImpl::haveWheelEventHandlers() const {

[aelias_OOO_until_Jul13, 2016/01/27 23:55:46]

Looks like this is only used by InspectorLayerTreeAgent.  It should probably
check if the layer is the root layer to avoid spammy duplication in the profiler
view.

[dtapuska, 2016/01/28 16:23:06]

I've removed this method for clarity.

-  return layer_->have_wheel_event_handlers();
+  if (const cc::LayerTreeHost* layer_tree_host = layer_->layer_tree_host())
+    return layer_tree_host->have_wheel_event_handlers();
+  return false;
 }
 
 void WebLayerImpl::setHaveScrollEventHandlers(bool have_scroll_event_handlers) {
   layer_->SetHaveScrollEventHandlers(have_scroll_event_handlers);
 }
 
 bool WebLayerImpl::haveScrollEventHandlers() const {
   return layer_->have_scroll_event_handlers();
 }
 
@@ skipping 203 matching lines @@
 
 Layer* WebLayerImpl::layer() const {
   return layer_.get();
 }
 
 void WebLayerImpl::SetContentsOpaqueIsFixed(bool fixed) {
   contents_opaque_is_fixed_ = fixed;
 }
 
 }  // namespace cc_blink