[Media Router] Add MediaSink subtypes

chrome/browser/media/router/mojo/media_router_mojo_impl.cc

Index: chrome/browser/media/router/mojo/media_router_mojo_impl.cc
diff --git a/chrome/browser/media/router/mojo/media_router_mojo_impl.cc b/chrome/browser/media/router/mojo/media_router_mojo_impl.cc
index 91c840db4e345016fb91f90ed364b62f39c13094..1ab82b225d87af0a89eff73ec52a7b4d37212bdf 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_impl.cc
+++ b/chrome/browser/media/router/mojo/media_router_mojo_impl.cc
@@ -175,7 +175,7 @@ void MediaRouterMojoImpl::OnIssue(const IssueInfo& issue) {
 
 void MediaRouterMojoImpl::OnSinksReceived(
     const std::string& media_source,
-    std::vector<mojom::MediaSinkPtr> sinks,
+    std::vector<std::unique_ptr<MediaSink>> sinks,
     const std::vector<std::string>& origins) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   DVLOG_WITH_INSTANCE(1) << "OnSinksReceived";
@@ -200,7 +200,7 @@ void MediaRouterMojoImpl::OnSinksReceived(
   std::vector<MediaSink> sink_list;
   sink_list.reserve(sinks.size());
   for (size_t i = 0; i < sinks.size(); ++i)
-    sink_list.push_back(sinks[i].To<MediaSink>());
+    sink_list.push_back(*sinks[i]);
 
   auto* sinks_query = it->second.get();
   sinks_query->has_cached_result = true;