NOT FOR LANDING - [WebView] Allow fling animation via the LayerScrollOffsetDelegate

cc/trees/layer_tree_host_impl.h

 // Copyright 2011 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_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 145 matching lines @@
   InputHandler::ScrollStatus FlingScrollBegin() override;
   void MouseMoveAt(const gfx::Point& viewport_point) override;
   void PinchGestureBegin() override;
   void PinchGestureUpdate(float magnify_delta,
                           const gfx::Point& anchor) override;
   void PinchGestureEnd() override;
   void StartPageScaleAnimation(const gfx::Vector2d& target_offset,
                                bool anchor_point,
                                float page_scale,
                                base::TimeDelta duration);
-  void SetNeedsAnimate() override;
+  void SetNeedsAnimateInput() override;
   bool IsCurrentlyScrollingLayerAt(const gfx::Point& viewport_point,
                                    InputHandler::ScrollInputType type) override;
   bool HaveWheelEventHandlersAt(const gfx::Point& viewport_point) override;
   bool DoTouchEventsBlockScrollAt(const gfx::Point& viewport_port) override;
   scoped_ptr<SwapPromiseMonitor> CreateLatencyInfoSwapPromiseMonitor(
       ui::LatencyInfo* latency) override;
   ScrollElasticityHelper* CreateScrollElasticityHelper() override;
 
   // TopControlsManagerClient implementation.
   float TopControlsHeight() const override;
@@ skipping 177 matching lines @@
       scoped_ptr<SwapPromise> swap_promise);
 
   bool IsActivelyScrolling() const;
 
   virtual void SetVisible(bool visible);
   bool visible() const { return visible_; }
 
   bool AnimationsAreVisible() { return visible() && CanDraw(); }
 
   void SetNeedsCommit() { client_->SetNeedsCommitOnImplThread(); }
+  void SetNeedsAnimate();
   void SetNeedsRedraw();
 
   ManagedMemoryPolicy ActualManagedMemoryPolicy() const;
 
   size_t memory_allocation_limit_bytes() const;
   int memory_allocation_priority_cutoff() const;
 
   void SetViewportSize(const gfx::Size& device_viewport_size);
   gfx::Size device_viewport_size() const { return device_viewport_size_; }
 
@@ skipping 174 matching lines @@
   void EnforceZeroBudget(bool zero_budget);
 
   bool IsSynchronousSingleThreaded() const;
 
   // Scroll by preferring to move the outer viewport first, only moving the
   // inner if the outer is at its scroll extents.
   void ScrollViewportBy(gfx::Vector2dF scroll_delta);
   // Scroll by preferring to move the inner viewport first, only moving the
   // outer if the inner is at its scroll extents.
   void ScrollViewportInnerFirst(gfx::Vector2dF scroll_delta);
+  void AnimateInput(base::TimeTicks monotonic_time);
   void AnimatePageScale(base::TimeTicks monotonic_time);
   void AnimateScrollbars(base::TimeTicks monotonic_time);
   void AnimateTopControls(base::TimeTicks monotonic_time);
 
   bool ShouldTopControlsConsumeScroll(const gfx::Vector2dF& scroll_delta) const;
 
   gfx::Vector2dF ScrollLayerWithViewportSpaceDelta(
       LayerImpl* layer_impl,
       float scale_from_viewport_to_screen_space,
       const gfx::PointF& viewport_point,
@@ skipping 78 matching lines @@
   ScopedPtrVector<SwapPromise> swap_promises_for_main_thread_scroll_update_;
 
   // An object to implement the ScrollElasticityHelper interface and
   // hold all state related to elasticity. May be NULL if never requested.
   scoped_ptr<ScrollElasticityHelper> scroll_elasticity_helper_;
 
   bool tile_priorities_dirty_;
 
   // The optional delegate for the root layer scroll offset.
   LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate_;
+  LayerScrollOffsetDelegate::AnimationCallback root_layer_animation_callback_;
+
   LayerTreeSettings settings_;
   LayerTreeDebugState debug_state_;
   bool visible_;
   ManagedMemoryPolicy cached_managed_memory_policy_;
 
   gfx::Vector2dF accumulated_root_overscroll_;
 
   bool pinch_gesture_active_;
   bool pinch_gesture_end_should_clear_scrolling_layer_;
   gfx::Point previous_pinch_anchor_;
@@ skipping 66 matching lines @@
   bool is_likely_to_require_a_draw_;
 
   scoped_ptr<FrameTimingTracker> frame_timing_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_