Update client side navigator.connect API to use ServicePortCollection [1/3]

public/platform/modules/navigator_services/WebServicePortProviderClient.h

+// Copyright 2015 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 WebServicePortProviderClient_h
+#define WebServicePortProviderClient_h
+
+#include "public/platform/WebCommon.h"
+
+namespace blink {
+
+// Interface implemented by blink, used for communication back from embedding
+// code to blink. An instance of this interface is passed to the embedder when
+// a WebServicePortProvider is created.
+class WebServicePortProviderClient {
+public:
+    // Post a message to one of the ports owned by a ServicePortCollection.
+    virtual void postMessage(WebServicePortID, const WebString&, const WebMessagePortChannelArray&) = 0;
+
+protected:
+    virtual ~WebServicePortProviderClient() {}
+};
+
+} // namespace blink
+
+#endif // WebServicePortProviderClient_h