Add HeadlessTabSocket

headless/lib/browser/headless_tab_socket_impl.h

+// 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 HEADLESS_LIB_BROWSER_HEADLESS_TAB_SOCKET_IMPL_H_
+#define HEADLESS_LIB_BROWSER_HEADLESS_TAB_SOCKET_IMPL_H_
+
+#include <list>
+
+#include "base/synchronization/lock.h"
+#include "headless/lib/tab_socket.mojom.h"
+#include "headless/public/headless_tab_socket.h"
+#include "mojo/public/cpp/bindings/binding_set.h"
+
+namespace headless {
+
+class HeadlessTabSocketImpl : public HeadlessTabSocket, public TabSocket {
+ public:
+  HeadlessTabSocketImpl();
+  ~HeadlessTabSocketImpl() override;
+
+  // HeadlessTabSocket implementation:
+  void SendMessageToTab(const std::string& message) override;
+  void SetListener(Listener* listener) override;
+
+  // TabSocket implementation:
+  void SendMessageToEmbedder(const std::string& message) override;
+  void AwaitNextMessageFromEmbedder(
+      const AwaitNextMessageFromEmbedderCallback& callback) override;
+
+  void CreateMojoService(mojo::InterfaceRequest<TabSocket> request);
+
+ private:
+  mojo::BindingSet<TabSocket> mojo_bindings_;
+
+  base::Lock lock_;  // Protects everything below.
+  AwaitNextMessageFromEmbedderCallback waiting_for_message_cb_;
+  std::list<std::string> outgoing_message_queue_;
+  std::list<std::string> incoming_message_queue_;
+  Listener* listener_;  // NOT OWNED
+
+  DISALLOW_COPY_AND_ASSIGN(HeadlessTabSocketImpl);
+};
+
+}  // namespace headless
+
+#endif  // HEADLESS_LIB_BROWSER_HEADLESS_TAB_SOCKET_IMPL_H_