Use v8::MicrotasksScope internally in V8RecursionScope.

extensions/renderer/api_test_base.cc

 // Copyright 2014 The Chromium 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 "extensions/renderer/api_test_base.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/run_loop.h"
@@ skipping 196 matching lines @@
   ModuleSystem::NativesEnabledScope natives_enabled(env()->module_system());
   v8::Local<v8::Value> result =
       env()->module_system()->CallModuleMethod("testBody", test_name);
   if (!result->IsTrue()) {
     base::MessageLoop::current()->PostTask(FROM_HERE, quit_closure);
     FAIL() << "Failed to run test \"" << test_name << "\"";
   }
 }
 
 void ApiTestEnvironment::RunPromisesAgain() {
-  env()->isolate()->RunMicrotasks();
+  v8::MicrotasksScope::PerformCheckpoint(env()->isolate());
   base::MessageLoop::current()->PostTask(
       FROM_HERE, base::Bind(&ApiTestEnvironment::RunPromisesAgain,
                             base::Unretained(this)));
 }
 
 ApiTestBase::ApiTestBase() {
 }
 
 ApiTestBase::~ApiTestBase() {
 }
 
 void ApiTestBase::SetUp() {
   ModuleSystemTest::SetUp();
   test_env_.reset(new ApiTestEnvironment(env()));
 }
 
 void ApiTestBase::RunTest(const std::string& file_name,
                           const std::string& test_name) {
   ExpectNoAssertionsMade();
   test_env_->RunTest(file_name, test_name);
 }
 
 }  // namespace extensions