Fix |RunMicrotasks()| leaking reference to the last context being run on.

src/bootstrapper.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "bootstrapper.h"
 
 #include "accessors.h"
 #include "isolate-inl.h"
 #include "natives.h"
 #include "snapshot.h"
@@ skipping 1534 matching lines @@
   INSTALL_NATIVE(JSFunction, "EnqueueSpliceRecord", observers_enqueue_splice);
   INSTALL_NATIVE(JSFunction, "BeginPerformSplice",
                  observers_begin_perform_splice);
   INSTALL_NATIVE(JSFunction, "EndPerformSplice",
                  observers_end_perform_splice);
 }
 
 
 void Genesis::InstallExperimentalNativeFunctions() {
   INSTALL_NATIVE(JSFunction, "RunMicrotasks", run_microtasks);
-  INSTALL_NATIVE(JSFunction, "EnqueueExternalMicrotask",
-                 enqueue_external_microtask);
+  INSTALL_NATIVE(JSFunction, "EnqueueMicrotask", enqueue_microtask);
 
   if (FLAG_harmony_promises) {
     INSTALL_NATIVE(JSFunction, "IsPromise", is_promise);
     INSTALL_NATIVE(JSFunction, "PromiseCreate", promise_create);
     INSTALL_NATIVE(JSFunction, "PromiseResolve", promise_resolve);
     INSTALL_NATIVE(JSFunction, "PromiseReject", promise_reject);
     INSTALL_NATIVE(JSFunction, "PromiseChain", promise_chain);
     INSTALL_NATIVE(JSFunction, "PromiseCatch", promise_catch);
   }
 
@@ skipping 1116 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   ASSERT(!IsActive());
 }
 
 } }  // namespace v8::internal