CC Animations: Port Impl-only-scrolling to use compositor animation timelines.

cc/animation/animation_host.h

 // Copyright 2015 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_ANIMATION_ANIMATION_HOST_H_
 #define CC_ANIMATION_ANIMATION_HOST_H_
 
 #include <vector>
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "cc/animation/animation_events.h"
 #include "cc/base/cc_export.h"
 #include "cc/trees/mutator_host_client.h"
 
+namespace gfx {
+class ScrollOffset;
+}
+
 namespace cc {
 
 class AnimationPlayer;
 class AnimationRegistrar;
 class AnimationTimeline;
 class ElementAnimations;
 class LayerAnimationController;
 class LayerTreeHost;
 
 enum class ThreadInstance { MAIN, IMPL };
@@ skipping 85 matching lines @@
 
   bool HasOnlyTranslationTransforms(int layer_id) const;
   bool AnimationsPreserveAxisAlignment(int layer_id) const;
 
   bool MaximumTargetScale(int layer_id, float* max_scale) const;
   bool AnimationStartScale(int layer_id, float* start_scale) const;
 
   bool HasAnyAnimation(int layer_id) const;
   bool HasActiveAnimation(int layer_id) const;
 
+  void ImplOnlyScrollAnimationCreate(int layer_id,
+                                     const gfx::ScrollOffset& target_offset,
+                                     const gfx::ScrollOffset& current_offset);
+  bool ImplOnlyScrollAnimationUpdateTarget(
+      int layer_id,
+      const gfx::Vector2dF& scroll_delta,
+      const gfx::ScrollOffset& max_scroll_offset,
+      base::TimeTicks frame_monotonic_time);
+
  private:
   explicit AnimationHost(ThreadInstance thread_instance);
 
   void PushTimelinesToImplThread(AnimationHost* host_impl) const;
   void RemoveTimelinesFromImplThread(AnimationHost* host_impl) const;
   void PushPropertiesToImplThread(AnimationHost* host_impl);
 
   void EraseTimelines(AnimationTimelineList::iterator begin,
                       AnimationTimelineList::iterator end);
 
   // TODO(loyso): For now AnimationPlayers share LayerAnimationController object
   // if they are attached to the same element(layer). Note that Element can
   // contain many Layers.
   typedef base::ScopedPtrHashMap<int, scoped_ptr<ElementAnimations>>
       LayerToElementAnimationsMap;
   LayerToElementAnimationsMap layer_to_element_animations_map_;
 
   AnimationTimelineList timelines_;
   scoped_ptr<AnimationRegistrar> animation_registrar_;
   MutatorHostClient* mutator_host_client_;
 
+  class ScrollOffsetAnimations;
+  scoped_ptr<ScrollOffsetAnimations> scroll_offset_animations_;
+
   const ThreadInstance thread_instance_;
 
   DISALLOW_COPY_AND_ASSIGN(AnimationHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_ANIMATION_ANIMATION_HOST_H_