Implement BroadcastChannel

components/webmessaging/broadcast_channel_service.h

Index: components/webmessaging/broadcast_channel_service.h
diff --git a/components/webmessaging/broadcast_channel_service.h b/components/webmessaging/broadcast_channel_service.h
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+++ b/components/webmessaging/broadcast_channel_service.h
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+// 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 COMPONENTS_WEBMESSAGING_BROADCAST_CHANNEL_SERVICE_H_
+#define COMPONENTS_WEBMESSAGING_BROADCAST_CHANNEL_SERVICE_H_
+
+#include <map>
+
+#include "base/memory/ref_counted.h"
+#include "components/webmessaging/public/interfaces/broadcast_channel.mojom.h"
+#include "url/origin.h"
+
+namespace webmessaging {
+
+class BroadcastChannelService
+    : public base::RefCountedThreadSafe<BroadcastChannelService> {
+ public:
+  BroadcastChannelService();
+  void Connect(mojom::BroadcastChannelServiceRequest request);
+
+ private:
+  class Connection;
+
+  friend class base::RefCountedThreadSafe<BroadcastChannelService>;
+  ~BroadcastChannelService();
+
+  void UnregisterConnection(Connection*);
+  void ReceivedMessageOnConnection(Connection*,
+                                   const url::Origin& origin,
+                                   const mojo::String& name,
+                                   const mojo::String& message);
+
+  std::set<Connection*> connections_;
+};
+
+}  // namespace webmessaging
+
+#endif  // COMPONENTS_WEBMESSAGING_CHANNEL_SERVICE_H_