Track transform animation content readiness on TransformNode.

cc/trees/property_tree.cc

 // Copyright 2014 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 <stddef.h>
 
 #include <set>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 175 matching lines @@
 
 bool TransformTree::OnTransformAnimated(ElementId element_id,
                                         const gfx::Transform& transform) {
   TransformNode* node = FindNodeFromElementId(element_id);
   DCHECK(node);
   if (node->local == transform)
     return false;
   node->local = transform;
   node->needs_local_transform_update = true;
   node->transform_changed = true;
+  node->ready_since_animation = false;

[wkorman, 2017/05/20 01:31:27]

Is it ok that we do this on both main and impl threads? I think it will be
ignored on main thread since only LayerTreeHostImpl actually reads the value.

   property_trees()->changed = true;
   set_needs_update(true);
   return true;
 }
 
 bool TransformTree::NeedsSourceToParentUpdate(TransformNode* node) {
   return (source_to_parent_updates_allowed() &&
           node->parent_id != node->source_node_id);
 }
 
@@ skipping 1896 matching lines @@
   const EffectNode* effect_node = effect_tree.Node(effect_id);
 
   if (effect_node->surface_contents_scale.x() != 0.0 &&
       effect_node->surface_contents_scale.y() != 0.0)
     screen_space_transform.Scale(1.0 / effect_node->surface_contents_scale.x(),
                                  1.0 / effect_node->surface_contents_scale.y());
   return screen_space_transform;
 }
 
 }  // namespace cc