cc : Track opacity animation changes on effect tree

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 <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1343 matching lines @@
 
 void LayerTreeHost::ElementTransformIsPotentiallyAnimatingChanged(
     ElementId element_id,
     ElementListType list_type,
     bool is_animating) {
   Layer* layer = LayerById(element_id);
   DCHECK(layer);
   layer->OnTransformIsPotentiallyAnimatingChanged(is_animating);
 }
 
+void LayerTreeHost::ElementOpacityIsAnimatingChanged(
+    ElementId element_id,
+    ElementListType list_type,
+    AnimationChangeType change_type,
+    bool is_animating) {
+  Layer* layer = LayerById(element_id);
+  if (layer) {
+    switch (change_type) {
+      case AnimationChangeType::POTENTIAL:
+        layer->OnOpacityIsPotentiallyAnimatingChanged(is_animating);
+        break;
+      case AnimationChangeType::RUNNING:
+        layer->OnOpacityIsCurrentlyAnimatingChanged(is_animating);
+        break;
+      case AnimationChangeType::BOTH:
+        layer->OnOpacityIsPotentiallyAnimatingChanged(is_animating);
+        layer->OnOpacityIsCurrentlyAnimatingChanged(is_animating);
+        break;
+    }
+  }
+}
+
 gfx::ScrollOffset LayerTreeHost::GetScrollOffsetForAnimation(
     ElementId element_id) const {
   Layer* layer = LayerById(element_id);
   DCHECK(layer);
   return layer->ScrollOffsetForAnimation();
 }
 
 bool LayerTreeHost::ScrollOffsetAnimationWasInterrupted(
     const Layer* layer) const {
   return animation_host_->ScrollOffsetAnimationWasInterrupted(layer->id());
@@ skipping 263 matching lines @@
   int seq_num = property_trees_.sequence_number;
   LayerTreeHostCommon::CallFunctionForEveryLayer(this, [seq_num](Layer* layer) {
     layer->set_property_tree_sequence_number(seq_num);
   });
 
   surface_id_namespace_ = proto.surface_id_namespace();
   next_surface_sequence_ = proto.next_surface_sequence();
 }
 
 }  // namespace cc