Adding momentum/overscroll to views:: ScrollViews

ui/compositor/layer.h

 // Copyright (c) 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 UI_COMPOSITOR_LAYER_H_
 #define UI_COMPOSITOR_LAYER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 366 matching lines @@
   // Whether this layer has animations waiting to get sent to its cc::Layer.
   bool HasPendingThreadedAnimationsForTesting() const;
 
   // Triggers a call to SwitchToLayer.
   void SwitchCCLayerForTest();
 
   const cc::Region& damaged_region_for_testing() const {
     return damaged_region_;
   }
 
+  gfx::ScrollOffset CurrentScrollOffset() const;
+  void SetScrollOffset(const gfx::ScrollOffset& offset);
+  void SetScrollable(Layer* parent_clip_layer,
+                     bool can_overscroll,
+                     const base::Closure& on_scroll);
+
  private:
   friend class LayerOwner;
 
   void CollectAnimators(std::vector<scoped_refptr<LayerAnimator> >* animators);
 
   // Stacks |child| above or below |other|.  Helper method for StackAbove() and
   // StackBelow().
   void StackRelativeTo(Layer* child, Layer* other, bool above);
 
   bool ConvertPointForAncestor(const Layer* ancestor, gfx::Point* point) const;
@@ skipping 133 matching lines @@
   // The texture scale.
   float texture_x_scale_;
   float texture_y_scale_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_H_