Changes error code to NotFoundError.

chrome/browser/media/router/presentation_service_delegate_impl.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/presentation_service_delegate_impl.h"
 
 #include <string>
 #include <unordered_map>
 #include <utility>
 #include <vector>
@@ skipping 770 matching lines @@
     error_cb.Run(content::PresentationError(content::PRESENTATION_ERROR_UNKNOWN,
                                             "Invalid presentation arguments."));
     return;
   }
 
   // TODO(crbug.com/670848): Improve handling of invalid URLs in
   // PresentationService::start().
   if (presentation_urls.empty() ||
       std::find_if_not(presentation_urls.begin(), presentation_urls.end(),
                        IsValidPresentationUrl) != presentation_urls.end()) {
-    error_cb.Run(content::PresentationError(content::PRESENTATION_ERROR_UNKNOWN,
-                                            "Invalid presentation URL."));
+    error_cb.Run(content::PresentationError(
+        content::PRESENTATION_ERROR_NO_PRESENTATION_FOUND,
+        "Invalid presentation URL."));
     return;
   }
 
   RenderFrameHostId render_frame_host_id(render_process_id, render_frame_id);
   std::unique_ptr<CreatePresentationConnectionRequest> request(
       new CreatePresentationConnectionRequest(
           render_frame_host_id, presentation_urls,
           GetLastCommittedURLForFrame(render_frame_host_id, web_contents_),
           base::Bind(&PresentationServiceDelegateImpl::OnStartSessionSucceeded,
                      weak_factory_.GetWeakPtr(), render_process_id,
@@ skipping 167 matching lines @@
 bool PresentationServiceDelegateImpl::HasScreenAvailabilityListenerForTest(
     int render_process_id,
     int render_frame_id,
     const MediaSource::Id& source_id) const {
   RenderFrameHostId render_frame_host_id(render_process_id, render_frame_id);
   return frame_manager_->HasScreenAvailabilityListenerForTest(
       render_frame_host_id, source_id);
 }
 
 }  // namespace media_router