Route Scroll events through a cc::InputHandler

ui/compositor/compositor.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_COMPOSITOR_H_
 #define UI_COMPOSITOR_COMPOSITOR_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 47 matching lines @@
 class GpuMemoryBufferManager;
 }
 
 namespace ui {
 
 class Compositor;
 class CompositorVSyncManager;
 class LatencyInfo;
 class Layer;
 class Reflector;
+class UIScrollInputManager;
 
 #if defined(USE_AURA)
 class Window;
 #endif
 
 const int kCompositorLockTimeoutMs = 67;
 
 class COMPOSITOR_EXPORT ContextFactoryObserver {
  public:
   virtual ~ContextFactoryObserver() {}
@@ skipping 294 matching lines @@
   const cc::LayerTreeDebugState& GetLayerTreeDebugState() const;
   void SetLayerTreeDebugState(const cc::LayerTreeDebugState& debug_state);
   const cc::RendererSettings& GetRendererSettings() const;
 
   LayerAnimatorCollection* layer_animator_collection() {
     return &layer_animator_collection_;
   }
 
   const cc::FrameSinkId& frame_sink_id() const { return frame_sink_id_; }
 
+  UIScrollInputManager* scroll_input_manager() {
+    return scroll_input_manager_.get();
+  }
+
  private:
   friend class base::RefCounted<Compositor>;
   friend class CompositorLock;
 
   // Called by CompositorLock.
   void UnlockCompositor();
 
   // Called to release any pending CompositorLock
   void CancelCompositorLock();
 
@@ skipping 28 matching lines @@
   // layers on.
   float device_scale_factor_;
 
   bool locks_will_time_out_;
   CompositorLock* compositor_lock_;
 
   LayerAnimatorCollection layer_animator_collection_;
   scoped_refptr<cc::AnimationTimeline> animation_timeline_;
 
   gfx::ColorSpace color_space_;
+  std::unique_ptr<UIScrollInputManager> scroll_input_manager_;
 
   base::WeakPtrFactory<Compositor> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Compositor);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_COMPOSITOR_H_