Move scroll event handlers from layer to layer tree view.

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 302 matching lines @@
 }
 
 bool WebLayerImpl::userScrollableHorizontal() const {
   return layer_->user_scrollable_horizontal();
 }
 
 bool WebLayerImpl::userScrollableVertical() const {
   return layer_->user_scrollable_vertical();
 }
 
-void WebLayerImpl::setHaveScrollEventHandlers(bool have_scroll_event_handlers) {
-  layer_->SetHaveScrollEventHandlers(have_scroll_event_handlers);
-}
-
-bool WebLayerImpl::haveScrollEventHandlers() const {
-  return layer_->have_scroll_event_handlers();
-}
-
 void WebLayerImpl::addMainThreadScrollingReasons(
     uint32_t main_thread_scrolling_reasons) {
   DCHECK(main_thread_scrolling_reasons);
   // WebLayerImpl should only know about non-transient scrolling
   // reasons. Transient scrolling reasons are computed per hit test.
   // TODO(tdresser): This is comparing less than a bit flag but that's not valid
   // if there is more than one reason given in |main_thread_scrolling_reasons|.
   DCHECK_LE(main_thread_scrolling_reasons,
             cc::MainThreadScrollingReason::kMaxNonTransientScrollingReasons);
   layer_->AddMainThreadScrollingReasons(main_thread_scrolling_reasons);
@@ skipping 167 matching lines @@
 
 Layer* WebLayerImpl::layer() const {
   return layer_.get();
 }
 
 void WebLayerImpl::SetContentsOpaqueIsFixed(bool fixed) {
   contents_opaque_is_fixed_ = fixed;
 }
 
 }  // namespace cc_blink