cc: Avoid Crash in Effect Tree Animation by Element ID

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 ab426546edbf1bac2b285b4b012b2ad81ce16868..bc4e7363f9f726b8d9340df9c80a951cc741e416 100644
--- a/cc/trees/property_tree.cc
+++ b/cc/trees/property_tree.cc
@@ -863,6 +863,11 @@ EffectNode* EffectTree::FindNodeFromElementId(ElementId id) {
 bool EffectTree::OnOpacityAnimated(ElementId id, float opacity) {
   EffectNode* node = FindNodeFromElementId(id);
   DCHECK(node);
+  // TODO(crbug.com/706766): Avoid crash. Need more investigation for what is
+  // calling this without setting element id.
+  if (!node)
+    return false;
+
   if (node->opacity == opacity)
     return false;
   node->opacity = opacity;
@@ -876,6 +881,11 @@ bool EffectTree::OnFilterAnimated(ElementId id,
                                   const FilterOperations& filters) {
   EffectNode* node = FindNodeFromElementId(id);
   DCHECK(node);
+  // TODO(crbug.com/706766): Avoid crash. Need more investigation for what is
+  // calling this without setting element id.
+  if (!node)
+    return false;
+
   if (node->filters == filters)
     return false;
   node->filters = filters;