Move scroll event handlers from layer to layer tree view.

cc/trees/layer_tree_impl.h

 // Copyright 2012 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.
 
 #ifndef CC_TREES_LAYER_TREE_IMPL_H_
 #define CC_TREES_LAYER_TREE_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 418 matching lines @@
   bool HasTransformAnimationThatInflatesBounds(const LayerImpl* layer) const;
   bool HasAnimationThatInflatesBounds(const LayerImpl* layer) const;
 
   bool FilterAnimationBoundsForBox(const LayerImpl* layer,
                                    const gfx::BoxF& box,
                                    gfx::BoxF* bounds) const;
   bool TransformAnimationBoundsForBox(const LayerImpl* layer,
                                       const gfx::BoxF& box,
                                       gfx::BoxF* bounds) const;
 
+  bool have_scroll_event_handlers() const {
+    return have_scroll_event_handlers_;
+  }
+  void set_have_scroll_event_handlers(bool have_event_handlers) {
+    have_scroll_event_handlers_ = have_event_handlers;
+  }
+
   bool have_wheel_event_handlers() const { return have_wheel_event_handlers_; }
   void set_have_wheel_event_handlers(bool have_event_handlers) {
     have_wheel_event_handlers_ = have_event_handlers;
   }
 
  protected:
   explicit LayerTreeImpl(
       LayerTreeHostImpl* layer_tree_host_impl,
       scoped_refptr<SyncedProperty<ScaleGroup>> page_scale_factor,
       scoped_refptr<SyncedTopControls> top_controls_shown_ratio,
@@ skipping 72 matching lines @@
 
   bool has_ever_been_drawn_;
 
   std::vector<scoped_ptr<SwapPromise>> swap_promise_list_;
   std::vector<scoped_ptr<SwapPromise>> pinned_swap_promise_list_;
 
   UIResourceRequestQueue ui_resource_request_queue_;
 
   int render_surface_layer_list_id_;
 
+  bool have_scroll_event_handlers_;
   bool have_wheel_event_handlers_;
 
   // Whether or not Blink's viewport size was shrunk by the height of the top
   // controls at the time of the last layout.
   bool top_controls_shrink_blink_size_;
   float top_controls_height_;
 
   // The amount that the top controls are shown from 0 (hidden) to 1 (fully
   // shown).
   scoped_refptr<SyncedTopControls> top_controls_shown_ratio_;
 
   scoped_ptr<PendingPageScaleAnimation> pending_page_scale_animation_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_IMPL_H_