[Presentation API] (4th)(1-UA blink side) Add WebPresentationConnection and WebPresentationConnecti…

third_party/WebKit/public/platform/modules/presentation/WebPresentationConnection.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 WebPresentationConnection_h
+#define WebPresentationConnection_h
+
+#include "public/platform/WebCommon.h"
+
+#include <memory>
+
+namespace blink {
+
+enum class WebPresentationConnectionState;
+class WebPresentationConnectionProxy;
+class WebString;
+
+// Implemented by the embedder for a PresentationConnection.
+class WebPresentationConnection {
+ public:
+  virtual ~WebPresentationConnection() = default;
+
+  // Takes ownership of |proxy| and stores it in connection object. Should be
+  // called only once.
+  virtual void bindProxy(std::unique_ptr<WebPresentationConnectionProxy>) = 0;
+
+  // Notifies the presentation about new message.
+  virtual void didReceiveTextMessage(const WebString& message) = 0;
+  virtual void didReceiveBinaryMessage(const uint8_t* data, size_t length) = 0;
+
+  // Notifies the connection about its state change.
+  virtual void didChangeState(WebPresentationConnectionState) = 0;
+};
+
+}  // namespace blink
+
+#endif  // WebPresentationConnection_h