Implement BroadcastChannel

third_party/WebKit/Source/modules/broadcastchannel/BroadcastChannel.h

+// Copyright 2016 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 BroadcastChannel_h
+#define BroadcastChannel_h
+
+#include "bindings/core/v8/ActiveScriptWrappable.h"
+#include "core/dom/ActiveDOMObject.h"
+#include "core/events/EventTarget.h"
+#include "modules/broadcastchannel/BroadcastChannelConnection.h"
+#include "platform/weborigin/SecurityOrigin.h"
+
+namespace blink {
+
+class BroadcastChannel final
+    : public EventTargetWithInlineData
+    , public ActiveScriptWrappable
+    , public ActiveDOMObject

[haraken, 2016/06/02 04:23:41]

ActiveDOMObject => ContextLifecycleObserver

If you don't need to observe suspend/resume, ContextLifecycleObserver would be
enough.

[Marijn Kruisselbrink, 2016/06/02 18:33:29]

Done

+    , public BroadcastChannelConnection::Client {
+    DEFINE_WRAPPERTYPEINFO();
+    USING_GARBAGE_COLLECTED_MIXIN(BroadcastChannel);
+    WTF_MAKE_NONCOPYABLE(BroadcastChannel);
+public:
+    static BroadcastChannel* create(ExecutionContext*, const String& name, ExceptionState&);
+    ~BroadcastChannel() override;
+
+    // IDL
+    void postMessage(const ScriptValue&, ExceptionState&);
+    void close();
+    DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
+
+    // BroadcastChannelConnection::Client
+    String name() const override { return m_name; }
+    SecurityOrigin* origin() const override { return m_origin.get(); }
+    void onMessage(const String& message) override;
+    void onError() override;
+
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* getExecutionContext() const override { return ActiveDOMObject::getExecutionContext(); }
+    bool hasPendingActivity() const override;
+
+    DECLARE_VIRTUAL_TRACE();
+
+private:
+    BroadcastChannel(ExecutionContext*, const String& name);
+
+    RefPtr<SecurityOrigin> m_origin;
+    String m_name;
+    BroadcastChannelConnection* m_connection;
+};
+
+} // namespace blink
+
+#endif // BroadcastChannel_h