Convert JsonWriter::Write to taking a const ref for the in-param

ios/web/webui/web_ui_ios_impl.h

Index: ios/web/webui/web_ui_ios_impl.h
diff --git a/ios/web/webui/web_ui_ios_impl.h b/ios/web/webui/web_ui_ios_impl.h
index 20b0fc3ef734cc5318785dd5d3acbb7802c14628..4c2573e1daddfae1119a60de87d8e2e77b445112 100644
--- a/ios/web/webui/web_ui_ios_impl.h
+++ b/ios/web/webui/web_ui_ios_impl.h
@@ -52,7 +52,7 @@ class WebUIIOSImpl : public web::WebUIIOS,
                               const base::Value& arg4) override;
   void CallJavascriptFunction(
       const std::string& function_name,
-      const std::vector<const base::Value*>& args) override;
+      const std::vector<const base::Value&>& args) override;
 
  private:
   // Executes JavaScript asynchronously on the page.