ServiceWorker: Use mojo's data pipe for respondWith(stream)

third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerStreamHandle.h

Index: third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerStreamHandle.h
diff --git a/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerStreamHandle.h b/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerStreamHandle.h
new file mode 100644
index 0000000000000000000000000000000000000000..e84879d8ee1652c6bc244c5a9a32da416f48c512
--- /dev/null
+++ b/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerStreamHandle.h
@@ -0,0 +1,39 @@
+// Copyright 2017 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.
+
+#ifndef WebServiceWorkerStreamHandle_h
+#define WebServiceWorkerStreamHandle_h
+
+#include <memory>
+
+#include "mojo/public/cpp/system/data_pipe.h"
+#include "public/platform/WebCommon.h"
+
+namespace blink {
+
+class BLINK_PLATFORM_EXPORT WebServiceWorkerStreamHandle {
+ public:
+  class Listener {
+   public:
+    virtual void OnAborted() = 0;
+    virtual void OnCompleted() = 0;
+  };
+
+  void setListener(std::unique_ptr<Listener>);
+  mojo::ScopedDataPipeConsumerHandle drainStreamDataPipe();
+
+#if INSIDE_BLINK
+  WebServiceWorkerStreamHandle(mojo::ScopedDataPipeConsumerHandle stream)
+      : m_stream(std::move(stream)) {}
+  void aborted();
+  void completed();
+#endif
+
+ private:
+  mojo::ScopedDataPipeConsumerHandle m_stream;
+  std::unique_ptr<Listener> m_listener;
+};
+}
+
+#endif  // WebServiceWorkerStreamHandle_h