[Android,Cast] Report correctly when devices are not available.

chrome/browser/media/android/router/media_router_dialog_controller_android.cc

Index: chrome/browser/media/android/router/media_router_dialog_controller_android.cc
diff --git a/chrome/browser/media/android/router/media_router_dialog_controller_android.cc b/chrome/browser/media/android/router/media_router_dialog_controller_android.cc
index cfd8ee04550af190a874d77ecd9b7923c0cb5a41..394ec70dc5cffad1a6bfd690a7e022f90984c2e7 100644
--- a/chrome/browser/media/android/router/media_router_dialog_controller_android.cc
+++ b/chrome/browser/media/android/router/media_router_dialog_controller_android.cc
@@ -87,6 +87,18 @@ void MediaRouterDialogControllerAndroid::OnDialogCancelled(
   CancelPresentationRequest();
 }
 
+void MediaRouterDialogControllerAndroid::OnMediaSourceNotSupported(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj) {
+  std::unique_ptr<CreatePresentationConnectionRequest> request =
+      TakeCreateConnectionRequest();
+  if (!request)
+    return;
+
+  request->InvokeErrorCallback(content::PresentationError(
+      content::PRESENTATION_ERROR_NO_AVAILABLE_SCREENS, "No screens found."));
+}
+
 void MediaRouterDialogControllerAndroid::CancelPresentationRequest() {
   std::unique_ptr<CreatePresentationConnectionRequest> request =
       TakeCreateConnectionRequest();