Remove isolate argument from handle allocation: Part II

runtime/vm/flow_graph_builder.cc

Index: runtime/vm/flow_graph_builder.cc
diff --git a/runtime/vm/flow_graph_builder.cc b/runtime/vm/flow_graph_builder.cc
index da2caaadb36901bf66eba322f7d04cc64e55e28e..ec41c27904032a85c88bd396971ba8c0db563ee1 100644
--- a/runtime/vm/flow_graph_builder.cc
+++ b/runtime/vm/flow_graph_builder.cc
@@ -2530,13 +2530,15 @@ void EffectGraphVisitor::VisitStringInterpolateNode(
 static void CollectClosureFunction(const Function& function) {
   if (function.HasCode()) return;
 
-  Isolate* isolate = Isolate::Current();
+  Thread* thread = Thread::Current();
+  Isolate* isolate = thread->isolate();
   if (isolate->collected_closures() == GrowableObjectArray::null()) {
     isolate->set_collected_closures(
         GrowableObjectArray::Handle(GrowableObjectArray::New()));
   }
   const GrowableObjectArray& functions =
-      GrowableObjectArray::Handle(isolate, isolate->collected_closures());
+      GrowableObjectArray::Handle(thread->zone(),
+                                  isolate->collected_closures());
   functions.Add(function);
 }