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

cc/trees/layer_tree_host.cc

 // 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.
 
 #include "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 #include <string>
 
@@ skipping 106 matching lines @@
       next_commit_forces_redraw_(false),
       shared_bitmap_manager_(params->shared_bitmap_manager),
       gpu_memory_buffer_manager_(params->gpu_memory_buffer_manager),
       task_graph_runner_(params->task_graph_runner),
       surface_id_namespace_(0u),
       next_surface_sequence_(1u) {
   DCHECK(task_graph_runner_);
 
   if (settings_.accelerated_animation_enabled) {
     if (settings_.use_compositor_animation_timelines) {
-      animation_host_ = AnimationHost::Create();
+      animation_host_ = AnimationHost::Create(ThreadInstance::MAIN);
       animation_host_->SetMutatorHostClient(this);
     } else {
       animation_registrar_ = AnimationRegistrar::Create();
     }
   }
 
   rendering_stats_instrumentation_->set_record_rendering_stats(
       debug_state_.RecordRenderingStats());
 }
 
@@ skipping 1004 matching lines @@
 
 void LayerTreeHost::SetLayerScrollOffsetMutated(
     int layer_id,
     LayerTreeType tree_type,
     const gfx::ScrollOffset& scroll_offset) {
   LayerAnimationValueObserver* layer = LayerById(layer_id);
   DCHECK(layer);
   layer->OnScrollOffsetAnimated(scroll_offset);
 }
 
+gfx::ScrollOffset LayerTreeHost::GetScrollOffsetForAnimation(
+    int layer_id) const {
+  LayerAnimationValueProvider* layer = LayerById(layer_id);
+  DCHECK(layer);
+  return layer->ScrollOffsetForAnimation();
+}
+
 bool LayerTreeHost::ScrollOffsetAnimationWasInterrupted(
     const Layer* layer) const {
   return animation_host_
              ? animation_host_->ScrollOffsetAnimationWasInterrupted(layer->id())
              : false;
 }
 
 bool LayerTreeHost::IsAnimatingFilterProperty(const Layer* layer) const {
   return animation_host_
              ? animation_host_->IsAnimatingFilterProperty(layer->id())
@@ skipping 38 matching lines @@
   return animation_host_ ? animation_host_->HasAnyAnimation(layer->id())
                          : false;
 }
 
 bool LayerTreeHost::HasActiveAnimation(const Layer* layer) const {
   return animation_host_ ? animation_host_->HasActiveAnimation(layer->id())
                          : false;
 }
 
 }  // namespace cc