[Media Router] Wire through a new MRPM call to update media sinks.

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

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_IMPL_H_
 #define CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_IMPL_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 317 matching lines @@
   // period.
   void EnsureMdnsDiscoveryEnabled();
   void DoEnsureMdnsDiscoveryEnabled();
 
   // Callback used to enabled mDNS in the MRPM if a firewall prompt will not be
   // triggered. If a firewall prompt would be triggered, enabling mDNS won't
   // happen until the user is clearly interacting with MR.
   void OnFirewallCheckComplete(bool firewall_can_use_local_ports);
 #endif
 
+  // Signal MRPM to initiate discovery.  This allows MRPs that only do discovery
+  // on sink queries to return results even if the MRP sink state is marked
+  // UNAVAILABLE.
+  void DoUserGestureDiscovery();
+
   // Pending requests queued to be executed once component extension
   // becomes ready.
   std::deque<base::Closure> pending_requests_;
 
   base::ScopedPtrHashMap<MediaSource::Id, scoped_ptr<MediaSinksQuery>>
       sinks_queries_;
 
   base::ScopedPtrHashMap<MediaSource::Id, scoped_ptr<MediaRoutesQuery>>
       routes_queries_;
 
@@ skipping 60 matching lines @@
 #endif
 
   base::WeakPtrFactory<MediaRouterMojoImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterMojoImpl);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_MEDIA_ROUTER_MOJO_MEDIA_ROUTER_MOJO_IMPL_H_