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

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 20d2f2748398fbd4a44a3a24e9e1bbff75186b8e..49b0c439c3acf41d3534def5ce147aa2ed31a6cb 100644
--- a/chrome/browser/media/router/mojo/media_router_mojo_impl.cc
+++ b/chrome/browser/media/router/mojo/media_router_mojo_impl.cc
@@ -427,6 +427,7 @@ void MediaRouterMojoImpl::ClearIssue(const Issue::Id& issue_id) {
 }
 
 void MediaRouterMojoImpl::OnUserGesture() {
+  DoUserGestureDiscovery();
 #if defined(OS_WIN)
   EnsureMdnsDiscoveryEnabled();
 #endif
@@ -986,4 +987,9 @@ void MediaRouterMojoImpl::OnFirewallCheckComplete(
 }
 #endif
 
+void MediaRouterMojoImpl::DoUserGestureDiscovery() {
+  SetWakeReason(MediaRouteProviderWakeReason::USER_GESTURE_DISCOVERY);

[mark a. foltz, 2016/04/07 22:45:00]

You need to check if the MRPM is awake and post a task if it isn't awake yet.
See the pattern in other methods in this API

[mark a. foltz, 2016/04/07 22:45:00]

You need to check if the MRPM is awake and post a task if it isn't awake yet.
See the pattern in other methods in this API

[amp, 2016/04/09 00:02:12]

Done.

+  media_route_provider_->StartDiscovery();
+}
+
 }  // namespace media_router