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

third_party/WebKit/public/platform/modules/presentation/WebPresentationConnectionProxy.h

Index: third_party/WebKit/public/platform/modules/presentation/WebPresentationConnectionProxy.h
diff --git a/third_party/WebKit/public/platform/modules/presentation/WebPresentationConnectionProxy.h b/third_party/WebKit/public/platform/modules/presentation/WebPresentationConnectionProxy.h
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index 0000000000000000000000000000000000000000..63401794d508533e3c8198b981c39651f52d51af
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+++ b/third_party/WebKit/public/platform/modules/presentation/WebPresentationConnectionProxy.h
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+// 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 WebPresentationConnectionProxy_h
+#define WebPresentationConnectionProxy_h
+
+namespace blink {
+
+// The implementation the embedder has to provide for the Presentation API to
+// work. This class is used to send messages to a PresentationConnection hosted
+// in a different frame.
+class WebPresentationConnectionProxy {
+ public:
+  virtual ~WebPresentationConnectionProxy() = default;
+};
+
+}  // namespace blink
+
+#endif  // WebPresentationConnectionProxy_h