[Media Router] Convert MediaRouter to use GURL for presentation URLs.

chrome/browser/media/router/create_presentation_connection_request.cc

 // 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.
 
 #include "chrome/browser/media/router/create_presentation_connection_request.h"
 
 #include "chrome/browser/media/router/media_source_helper.h"
 #include "chrome/browser/media/router/route_request_result.h"
+#include "url/gurl.h"
 
 using content::PresentationSessionInfo;
 using content::PresentationError;
 
 namespace media_router {
 
 CreatePresentationConnectionRequest::CreatePresentationConnectionRequest(
     const RenderFrameHostId& render_frame_host_id,
-    const std::string& presentation_url,
+    const GURL& presentation_url,
     const GURL& frame_url,
     const PresentationSessionSuccessCallback& success_cb,
     const PresentationSessionErrorCallback& error_cb)
     : presentation_request_(render_frame_host_id,
                             {presentation_url},
                             frame_url),
       success_cb_(success_cb),
       error_cb_(error_cb),
       cb_invoked_(false) {
   DCHECK(!success_cb.is_null());
@@ skipping 36 matching lines @@
   if (!result.route()) {
     presentation_request->InvokeErrorCallback(content::PresentationError(
         content::PRESENTATION_ERROR_UNKNOWN, result.error()));
   } else {
     presentation_request->InvokeSuccessCallback(
         result.presentation_id(), result.route()->media_route_id());
   }
 }
 
 }  // namespace media_router