[Media Router] Support dual discovery

chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.cc

Index: chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.cc
diff --git a/chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.cc b/chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.cc
index 10801e62a22990df9f86b6cd014d01a1e0c52461..731fc1f28089ec693b9dfb90afdb80632f403a99 100644
--- a/chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.cc
+++ b/chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/media/router/discovery/dial/dial_media_sink_service_proxy.h"
 
 #include "chrome/browser/media/router/discovery/dial/dial_media_sink_service_impl.h"
+#include "chrome/browser/media/router/discovery/mdns/cast_media_sink_service.h"
 #include "content/public/browser/browser_context.h"
 
 using content::BrowserThread;
@@ -39,6 +40,12 @@ void DialMediaSinkServiceProxy::Stop() {
       base::Bind(&DialMediaSinkServiceProxy::StopOnIOThread, this));
 }
 
+void DialMediaSinkServiceProxy::SetDialMediaSinkServiceDelegate(
+    scoped_refptr<DialMediaSinkServiceDelegate> delegate) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  delegate_ = delegate;
+}
+
 void DialMediaSinkServiceProxy::SetDialMediaSinkServiceForTest(
     std::unique_ptr<DialMediaSinkServiceImpl> dial_media_sink_service) {
   DCHECK(dial_media_sink_service);
@@ -54,6 +61,7 @@ void DialMediaSinkServiceProxy::StartOnIOThread() {
         base::Bind(&DialMediaSinkServiceProxy::OnSinksDiscoveredOnIOThread,
                    this),
         request_context_.get());
+    dial_media_sink_service_->SetDialMediaSinkServiceDelegate(delegate_);
   }
 
   dial_media_sink_service_->Start();