[Presentation API, MediaRouter] Routing from media sink selection to route creation.

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;
@@ skipping 37 matching lines @@
 
 void CreatePresentationSessionRequest::MaybeInvokeErrorCallback(
     const content::PresentationError& error) {
   DCHECK(!cb_invoked_);
   if (!cb_invoked_) {
     error_cb_.Run(error);
     cb_invoked_ = true;
   }
 }
 
+// static
+void CreatePresentationSessionRequest::HandleRouteResponse(
+    scoped_ptr<CreatePresentationSessionRequest> presentation_request,
+    const MediaRoute* route,
+    const std::string& presentation_id,
+    const std::string& error) {
+  DCHECK(presentation_request);

[Wez, 2015/08/18 21:50:09]

nit: No need to DCHECK here, since both paths de-ref it, which will DCHECK if
it's NULL anyway.

[whywhat, 2015/08/19 13:04:29]

Done.

+  if (!route) {
+    presentation_request->MaybeInvokeErrorCallback(
+        content::PresentationError(content::PRESENTATION_ERROR_UNKNOWN, error));
+  } else {
+    presentation_request->MaybeInvokeSuccessCallback(
+        presentation_id, route->media_route_id());
+  }
+}
+
 }  // namespace media_router