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
new file mode 100644
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+++ b/components/webmessaging/broadcast_channel_service.h
@@ -0,0 +1,46 @@
+// 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 "mojo/public/cpp/bindings/binding_set.h"
+#include "url/origin.h"
+
+namespace webmessaging {
+
+class BroadcastChannelService
+    : public base::RefCountedThreadSafe<BroadcastChannelService>,
+      public mojom::BroadcastChannelService {
+ public:
+  BroadcastChannelService();
+  void Connect(mojo::InterfaceRequest<mojom::BroadcastChannelService> request);
+
+  void ConnectToChannel(
+      const url::Origin& origin,
+      const mojo::String& name,
+      mojom::BroadcastChannelClientAssociatedPtrInfo client,
+      mojom::BroadcastChannelClientAssociatedRequest connection) override;
+
+ private:
+  friend class base::RefCountedThreadSafe<BroadcastChannelService>;
+  class Connection;
+
+  ~BroadcastChannelService() override;
+
+  void UnregisterConnection(Connection*);
+  void ReceivedMessageOnConnection(Connection*, const mojo::String& message);
+
+  mojo::BindingSet<mojom::BroadcastChannelService> bindings_;
+  std::map<url::Origin, std::multimap<std::string, std::unique_ptr<Connection>>>
+      connections_;
+};
+
+}  // namespace webmessaging
+
+#endif  // COMPONENTS_WEBMESSAGING_CHANNEL_SERVICE_H_