Move scroll event handlers from layer to layer tree view.

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include <stddef.h>
 #include <limits>
 #include <string>
 #include <utility>
@@ skipping 733 matching lines @@
 }
 
 void RenderWidgetCompositor::setHaveWheelEventHandlers(bool value) {
   layer_tree_host_->SetHaveWheelEventHandlers(value);
 }
 
 bool RenderWidgetCompositor::haveWheelEventHandlers() const {
   return layer_tree_host_->have_wheel_event_handlers();
 }
 
+void RenderWidgetCompositor::setHaveScrollEventHandlers(bool has_handlers) {
+  layer_tree_host_->SetHaveScrollEventHandlers(has_handlers);
+}
+
+bool RenderWidgetCompositor::haveScrollEventHandlers() const {
+  return layer_tree_host_->have_scroll_event_handlers();
+}
+
 void CompositeAndReadbackAsyncCallback(
     blink::WebCompositeAndReadbackAsyncCallback* callback,
     scoped_ptr<cc::CopyOutputResult> result) {
   if (result->HasBitmap()) {
     scoped_ptr<SkBitmap> result_bitmap = result->TakeBitmap();
     callback->didCompositeAndReadback(*result_bitmap);
   } else {
     callback->didCompositeAndReadback(SkBitmap());
   }
 }
@@ skipping 342 matching lines @@
 #endif
   return actual;
 }
 
 void RenderWidgetCompositor::SetPaintedDeviceScaleFactor(
     float device_scale) {
   layer_tree_host_->SetPaintedDeviceScaleFactor(device_scale);
 }
 
 }  // namespace content