[Presentation API / Media Router] Clean up default pres URL logic.

chrome/browser/media/router/create_presentation_session_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_session_request.h"
 
 #include "chrome/browser/media/router/media_source_helper.h"
 
 using content::PresentationSessionInfo;
 using content::PresentationError;
 
 namespace media_router {
 
 CreatePresentationSessionRequest::CreatePresentationSessionRequest(
+    const RenderFrameHostId& render_frame_host_id,
     const std::string& presentation_url,
     const GURL& frame_url,
     const PresentationSessionSuccessCallback& success_cb,
-    const PresentationSessionErrorCallback& error_cb)
-    : media_source_(MediaSourceForPresentationUrl(presentation_url)),
-      frame_url_(frame_url),
+    const content::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());
   DCHECK(!error_cb.is_null());
 }
 
 CreatePresentationSessionRequest::~CreatePresentationSessionRequest() {
   if (!cb_invoked_) {
     error_cb_.Run(content::PresentationError(
         content::PRESENTATION_ERROR_UNKNOWN, "Unknown error."));
   }
 }
 
 void CreatePresentationSessionRequest::InvokeSuccessCallback(
     const std::string& presentation_id,
     const MediaRoute::Id& route_id) {
   DCHECK(!cb_invoked_);
   if (!cb_invoked_) {
-    // Overwrite presentation ID.
     success_cb_.Run(
         content::PresentationSessionInfo(
-            PresentationUrlFromMediaSource(media_source_), presentation_id),
+            presentation_request_.presentation_url(), presentation_id),
         route_id);
     cb_invoked_ = true;
   }
 }
 
 void CreatePresentationSessionRequest::InvokeErrorCallback(
     const content::PresentationError& error) {
   DCHECK(!cb_invoked_);
   if (!cb_invoked_) {
     error_cb_.Run(error);
@@ skipping 10 matching lines @@
   if (!route) {
     presentation_request->InvokeErrorCallback(
         content::PresentationError(content::PRESENTATION_ERROR_UNKNOWN, error));
   } else {
     presentation_request->InvokeSuccessCallback(presentation_id,
                                                 route->media_route_id());
   }
 }
 
 }  // namespace media_router