Use CallJavascriptFunction instead of CallJavascriptFunctionUnsafe in sign-in error dialog.

chrome/browser/ui/webui/signin/signin_error_handler.cc

Index: chrome/browser/ui/webui/signin/signin_error_handler.cc
diff --git a/chrome/browser/ui/webui/signin/signin_error_handler.cc b/chrome/browser/ui/webui/signin/signin_error_handler.cc
index c42f4a033011c7eb77143acdc1003f6eaa11de65..4680527565821f724dd384e88f35ae4aac497d4a 100644
--- a/chrome/browser/ui/webui/signin/signin_error_handler.cc
+++ b/chrome/browser/ui/webui/signin/signin_error_handler.cc
@@ -66,8 +66,9 @@ void SigninErrorHandler::HandleLearnMore(const base::ListValue* args) {
 
 void SigninErrorHandler::HandleInitializedWithSize(
     const base::ListValue* args) {
+  AllowJavascript();
   if (duplicate_profile_path_.empty())
-    web_ui()->CallJavascriptFunctionUnsafe("signin.error.removeSwitchButton");
+    CallJavascriptFunction("signin.error.removeSwitchButton");
 
   signin::SetInitializedModalHeight(web_ui(), args);
 
@@ -76,7 +77,7 @@ void SigninErrorHandler::HandleInitializedWithSize(
   // TODO(anthonyvd): Figure out why this is needed on Mac and not other
   // platforms and if there's a way to start unfocused while avoiding this
   // workaround.
-  web_ui()->CallJavascriptFunctionUnsafe("signin.error.clearFocus");
+  CallJavascriptFunction("signin.error.clearFocus");
 }
 
 void SigninErrorHandler::CloseDialog() {