Initial implementation of stashed message ports, blink side

Source/modules/serviceworkers/StashedMessagePort.h

+// Copyright 2015 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 StashedMessagePort_h
+#define StashedMessagePort_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "core/dom/MessagePort.h"
+
+namespace blink {
+class ExecutionContext;
+class StashedMessagePort;
+
+using StashedMessagePortArray = WillBeHeapVector<RefPtrWillBeMember<StashedMessagePort>, 1>;
+
+// Represents a message port that has been stashed. Overrides messageAvailable
+// to dispatch messages as a global event instead of as events on this port.
+class StashedMessagePort final : public MessagePort {
+    DEFINE_WRAPPERTYPEINFO();
+    WTF_MAKE_NONCOPYABLE(StashedMessagePort);
+public:
+    static PassRefPtrWillBeRawPtr<StashedMessagePort> create(ExecutionContext&, PassOwnPtr<WebMessagePortChannel>, const String& name);
+    virtual ~StashedMessagePort();
+
+    static PassOwnPtrWillBeRawPtr<StashedMessagePortArray> toStashedMessagePortArray(ExecutionContext*, const WebMessagePortChannelArray&, const WebVector<WebString>& channelKeys);
+
+    // StashedMessagePort.idl
+    String name() const;
+
+    DEFINE_INLINE_VIRTUAL_TRACE() { MessagePort::trace(visitor); }
+
+private:
+    StashedMessagePort(ExecutionContext&, PassOwnPtr<WebMessagePortChannel>, const String& name);
+
+    void messageAvailable() override;
+    void dispatchMessages();
+
+    String m_name;
+    WeakPtrFactory<StashedMessagePort> m_weakFactory;
+};
+
+} // namespace blink
+
+#endif // StashedMessagePort_h