Implement closurization of regular methods in ObjectMirror.getField in the VM.

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 78efd462b248c9e7e062846ca397b31c56a2fb64..728a9193f2d23d42bdee7b69a4a8ffacf3e03d27 100644
--- a/runtime/vm/flow_graph_builder.cc
+++ b/runtime/vm/flow_graph_builder.cc
@@ -2028,7 +2028,7 @@ void EffectGraphVisitor::VisitClosureNode(ClosureNode* node) {
   const Function& function = node->function();
 
   if (function.IsImplicitStaticClosureFunction()) {
-    Instance& closure = Instance::ZoneHandle();
+/*    Instance& closure = Instance::ZoneHandle();
     closure ^= function.implicit_static_closure();
     if (closure.IsNull()) {
       ObjectStore* object_store = Isolate::Current()->object_store();
@@ -2037,6 +2037,10 @@ void EffectGraphVisitor::VisitClosureNode(ClosureNode* node) {
       function.set_implicit_static_closure(closure);
     }
     ReturnDefinition(new ConstantInstr(closure));
+*/
+    const Instance& closure =
+        Instance::ZoneHandle(function.ImplicitStaticClosure());
+    ReturnDefinition(new ConstantInstr(closure));
     return;
   }
   if (function.IsNonImplicitClosureFunction()) {