[Media Router] Wiring for searching route providers for new sinks.

chrome/browser/media/router/mojo/media_router.mojom

Index: chrome/browser/media/router/mojo/media_router.mojom
diff --git a/chrome/browser/media/router/mojo/media_router.mojom b/chrome/browser/media/router/mojo/media_router.mojom
index 683904122489d906d2ffbca2765f76648c824c13..e0900c4ed07ae058c06cbcb791f479827e82c23c 100644
--- a/chrome/browser/media/router/mojo/media_router.mojom
+++ b/chrome/browser/media/router/mojo/media_router.mojom
@@ -114,6 +114,13 @@ struct RouteMessage {
   array<uint8>? data;
 };
 
+struct SinkSearchCriteria {
+  // Arbitrary string input to the search method.
+  string input;
+  // The user's current hosted domain.
+  string domain;
+};
+
 // Maps to a ResultCode value in route_request_result.h
 // The enum defined here is a subset of those defined in route_request_result.h.
 enum RouteRequestResultCode {
@@ -286,6 +293,24 @@ interface MediaRouteProvider {
   // Calling this will trigger a firewall prompt on Windows if there is not
   // already a firewall rule for mDNS.
   EnableMdnsDiscovery();
+
+  // Indicates that the Media Router is interested in finding a sink that
+  // matches |search_criteria| and is compatible with the source urn
+  // |media_source|. The user's current domain is also used to search. If a sink
+  // is found, a route is also created from |media_source| to the new sink. The
+  // parameters beyond |search_criteria| will be forwarded to CreateRoute if a
+  // sink is found.
+  SearchSinksAndCreateRoute(string sink_id,
+                            string media_source,
+                            SinkSearchCriteria search_criteria,
+                            string presentation_id,
+                            string origin,
+                            int32 tab_id,
+                            int64 timeout_millis,
+                            bool off_the_record) =>
+                                (MediaRoute? route,
+                                 string? error_text,
+                                 RouteRequestResultCode result_code);
 };
 
 // Interface for a service which observes state changes across media
@@ -330,6 +355,12 @@ interface MediaRouter {
   OnSinksReceived(string media_source, array<MediaSink> sinks,
       array<string> origins);
 
+  // Called when the Media Route Manager has found a sink for a current search
+  // to inform the MR and UI of the ID of the new sink. The sink object itself
+  // will be returned in the next OnSinksReceived() as part of the normal sink
+  // list update process. |pseudo_sink_id| identifies the current search.
+  OnSearchSinkIdReceived(string pseudo_sink_id, string sink_id);
+
   // Called when issues are reported for media routes.
   OnIssue(Issue issue);