Mojo JS bindings: draining a DataPipe

gin/run_microtasks_observer.cc

Index: gin/run_microtasks_observer.cc
diff --git a/gin/run_microtasks_observer.cc b/gin/run_microtasks_observer.cc
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index 0000000000000000000000000000000000000000..f453a66a1ebdcb46df60c1ece6888a5af3be58a8
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+++ b/gin/run_microtasks_observer.cc
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+// 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 "gin/run_microtasks_observer.h"
+
+namespace gin {
+
+RunMicrotasksObserver::RunMicrotasksObserver(v8::Isolate* isolate)
+    : isolate_(isolate) {
+}
+
+void RunMicrotasksObserver::WillProcessTask(const base::PendingTask& task) {
+}
+
+void RunMicrotasksObserver::DidProcessTask(const base::PendingTask& task) {
+  v8::Isolate::Scope scope(isolate_);
+  isolate_->RunMicrotasks();
+}
+
+}  // namespace gin