[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 1f25a95ba796172be5f05f7cce0c1b07971f968a..d792bac437d33f1b592290cfe591361ccfd3e63c 100644
--- a/chrome/browser/media/router/mojo/media_router.mojom
+++ b/chrome/browser/media/router/mojo/media_router.mojom
@@ -114,6 +114,14 @@ struct RouteMessage {
   array<uint8>? data;
 };
 
+struct SinkSearchCriteria {
+  // Input to the search method which each Media Route Provider may interpret
+  // differently.
+  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 {
@@ -188,7 +196,7 @@ interface MediaRouteProvider {
 
   // Creates a new route for |media_source| that connects to the established
   // route given by |route_id|.
-  // 
+  //
   // The presentation ID of the new route will be |presentation_id|, but it may
   // be overridden by a provider implementation.  The presentation ID will be
   // used by the presentation API to refer to the created route.
@@ -289,6 +297,24 @@ interface MediaRouteProvider {
 
   // Updates media sinks capable of displaying |media_source|.
   UpdateMediaSinks(string media_source);
+
+  // 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
@@ -333,6 +359,12 @@ 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);