[generators] Always call function with closure context when resuming.

src/runtime/runtime-generator.cc

Index: src/runtime/runtime-generator.cc
diff --git a/src/runtime/runtime-generator.cc b/src/runtime/runtime-generator.cc
index 81c66408d363955522d998639132ba848d52dcfe..96486736e124b6fef046f0d56215bf8dcbb7265a 100644
--- a/src/runtime/runtime-generator.cc
+++ b/src/runtime/runtime-generator.cc
@@ -61,6 +61,14 @@ RUNTIME_FUNCTION(Runtime_GeneratorGetReceiver) {
   return generator->receiver();
 }
 
+RUNTIME_FUNCTION(Runtime_GeneratorGetContext) {
+  HandleScope scope(isolate);
+  DCHECK_EQ(1, args.length());
+  CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
+
+  return generator->context();
+}
+
 RUNTIME_FUNCTION(Runtime_GeneratorGetInputOrDebugPos) {
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());