[PresentationAPI] Use KURL and WebURL in place of string types.

third_party/WebKit/public/platform/modules/presentation/WebPresentationConnectionClient.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 WebPresentationConnectionClient_h
 #define WebPresentationConnectionClient_h
 
 #include "public/platform/WebString.h"
+#include "public/platform/WebURL.h"
 
 namespace blink {
 
 enum class WebPresentationConnectionState {
     Connected = 0,
     Closed,
     Terminated,
 };
 
 enum class WebPresentationConnectionCloseReason {
     Error = 0,
     Closed,
     WentAway
 };
 
 // The implementation the embedder has to provide for the Presentation API to work.
 class WebPresentationConnectionClient {
 public:
     virtual ~WebPresentationConnectionClient() { }
 
     virtual WebString getId() = 0;
-    virtual WebString getUrl() = 0;
+    virtual WebURL getUrl() = 0;
 };
 
 } // namespace blink
 
 #endif // WebPresentationConnectionClient_h