[Media Router] Add ProvideSinks() Mojo API

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

 // 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.
 
 module media_router.mojom;
 
 import "mojo/common/time.mojom";
 import "url/mojo/origin.mojom";
 import "url/mojo/url.mojom";
 
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   // Indicates that the Media Router is interested in finding a sink that
   // matches |search_criteria| and is compatible with the source urn
   // |media_source|. |search_criteria| should contain an exact copy of the user
   // input. The user's current domain is also used to search.  The domain is the
   // hosted domain of the user's signed-in identity, or empty if the user has no
   // domain or is not signed in.
   SearchSinks(string sink_id,
               string media_source,
               SinkSearchCriteria search_criteria) =>
                   (string sink_id);
+
+  // Called when the list of MediaSinks discovered by Media Router has been
+  // updated. The sinks are supplied to the MediaRouteProvider so that they can
+  // be used for other operations, such as route creation.
+  ProvideSinks(string provider_name, array<MediaSink> sinks);
 };
 
 // Interface for a service which observes state changes across media
 // sources, sinks, and issues.
 interface MediaRouter {
 
   // Represents overall media sink availability states.
   // UNAVAILABLE - No sinks are available.
   // PER_SOURCE - Sinks are available, but are only compatible with specific
   //              media sources.
@@ skipping 55 matching lines @@
 
   // Called when the a batch of messages arrives from the media sink for the
   // route given by |route_id|.
   // |StartListeningForRouteMessages| must be called first in order to receive
   // messages.
   // |route_id|: ID of route of the messages.
   // |messages|: A non-empty list of messages received.
   OnRouteMessagesReceived(string route_id,
                           array<RouteMessage> messages);
 };