cc : Add OnTransformAnimated to transform tree

cc/trees/property_tree.cc

Index: cc/trees/property_tree.cc
diff --git a/cc/trees/property_tree.cc b/cc/trees/property_tree.cc
index 20290755ee5a3b075b7503676c570ee3f9501c36..e7bcce95294477d1437bf65658e2fd8e9614d4c3 100644
--- a/cc/trees/property_tree.cc
+++ b/cc/trees/property_tree.cc
@@ -218,6 +218,28 @@ bool TransformTree::ComputeTranslation(int source_id,
   return true;
 }
 
+void TransformTree::OnTransformAnimated(const gfx::Transform& transform,
+                                        int id,
+                                        LayerTreeImpl* layer_tree_impl) {
+  TransformNode* node = Node(id);
+  layer_tree_impl->AddToTransformAnimationsMap(node->owner_id, transform);
+  if (node->local == transform) {
+    return;
+  }
+  node->local = transform;
+  node->needs_local_transform_update = true;
+  node->transform_changed = true;
+  property_trees()->changed = true;
+  set_needs_update(true);
+  layer_tree_impl->set_needs_update_draw_properties();
+  // TODO(ajuma): The current criteria for creating clip nodes means that
+  // property trees may need to be rebuilt when the new transform isn't
+  // axis-aligned wrt the old transform (see Layer::SetTransform). Since
+  // rebuilding property trees every frame of a transform animation is
+  // something we should try to avoid, change property tree-building so that
+  // it doesn't depend on axis aliginment.

[ajuma, 2016/08/23 23:40:12]

I think this TODO is obsolete now, since we don't check axis-alignment when
creating clip nodes.

[jaydasika, 2016/08/24 00:13:42]

Removed!

+}
+
 bool TransformTree::NeedsSourceToParentUpdate(TransformNode* node) {
   return (source_to_parent_updates_allowed() &&
           node->parent_id != node->source_node_id);
@@ -917,6 +939,7 @@ void EffectTree::OnOpacityAnimated(float opacity,
                                    int id,
                                    LayerTreeImpl* layer_tree_impl) {
   EffectNode* node = Node(id);
+  layer_tree_impl->AddToOpacityAnimationsMap(node->owner_id, opacity);
   if (node->opacity == opacity)
     return;
   node->opacity = opacity;
@@ -924,7 +947,6 @@ void EffectTree::OnOpacityAnimated(float opacity,
   property_trees()->changed = true;
   property_trees()->effect_tree.set_needs_update(true);
   layer_tree_impl->set_needs_update_draw_properties();
-  layer_tree_impl->AddToOpacityAnimationsMap(node->owner_id, opacity);
 }
 
 void EffectTree::UpdateEffects(int id) {