Remove base::Value::CreateNullValue

chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc

Index: chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
diff --git a/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc b/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
index 5c223c578dcf4799bff357c4ba60f1d45e3fa360..f4ac35ecee5bad3a4bc300535d1001db306df141 100644
--- a/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
+++ b/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.cc
@@ -286,9 +286,9 @@ void MediaRouterWebUIMessageHandler::OnCreateRouteResponseReceived(
                                            base::Value(sink_id), *route_value,
                                            base::Value(route->for_display()));
   } else {
-    web_ui()->CallJavascriptFunctionUnsafe(
-        kOnCreateRouteResponseReceived, base::Value(sink_id),
-        *base::Value::CreateNullValue(), base::Value(false));
+    web_ui()->CallJavascriptFunctionUnsafe(kOnCreateRouteResponseReceived,
+                                           base::Value(sink_id), base::Value(),
+                                           base::Value(false));
   }
 }
 
@@ -306,8 +306,7 @@ void MediaRouterWebUIMessageHandler::UpdateIssue(const Issue& issue) {
 
 void MediaRouterWebUIMessageHandler::ClearIssue() {
   DVLOG(2) << "ClearIssue";
-  web_ui()->CallJavascriptFunctionUnsafe(kSetIssue,
-                                         *base::Value::CreateNullValue());
+  web_ui()->CallJavascriptFunctionUnsafe(kSetIssue, base::Value());
 }
 
 void MediaRouterWebUIMessageHandler::UpdateMaxDialogHeight(int height) {