Move have_wheel_event_handlers to WebLayerTreeView.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index beaae7530bfa6fb3aab4c34729915d5fcb5c4f78..4ee577b3b8ea727091e599c9f487313016091ad5 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -745,6 +745,10 @@ void RenderWidgetCompositor::clearSelection() {
   layer_tree_host_->RegisterSelection(empty_selection);
 }
 
+void RenderWidgetCompositor::setHaveWheelEventHandlers(bool value) {
+  layer_tree_host_->SetHaveWheelEventHandlers(value);
+}
+
 void CompositeAndReadbackAsyncCallback(
     blink::WebCompositeAndReadbackAsyncCallback* callback,
     scoped_ptr<cc::CopyOutputResult> result) {