[Presentation API] Remove references to presentation sessions.

chrome/browser/ui/webui/media_router/media_router_ui.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/ui/webui/media_router/media_router_ui.h"
 
 #include <algorithm>
 #include <string>
 #include <unordered_map>
 #include <utility>
@@ skipping 185 matching lines @@
         this);
   // If |create_session_request_| still exists, then it means presentation route
   // request was never attempted.
   if (create_session_request_) {
     bool presentation_sinks_available = std::any_of(
         sinks_.begin(), sinks_.end(), [](const MediaSinkWithCastModes& sink) {
           return base::ContainsValue(sink.cast_modes, MediaCastMode::DEFAULT);
         });
     if (presentation_sinks_available) {
       create_session_request_->InvokeErrorCallback(content::PresentationError(
-          content::PRESENTATION_ERROR_SESSION_REQUEST_CANCELLED,
+          content::PRESENTATION_ERROR_PRESENTATION_REQUEST_CANCELLED,
           "Dialog closed."));
     } else {
       create_session_request_->InvokeErrorCallback(content::PresentationError(
           content::PRESENTATION_ERROR_NO_AVAILABLE_SCREENS,
           "No screens found."));
     }
   }
 }
 
 void MediaRouterUI::InitWithDefaultMediaSource(
@@ skipping 544 matching lines @@
 }
 
 std::string MediaRouterUI::GetSerializedInitiatorOrigin() const {
   url::Origin origin = initiator_
                            ? url::Origin(initiator_->GetLastCommittedURL())
                            : url::Origin();
   return origin.Serialize();
 }
 
 }  // namespace media_router