1 files changed, 12 insertions, 0 deletions
diff --git a/dom/base/nsGlobalWindow.cpp b/dom/base/nsGlobalWindow.cpp
index c6b35a9bf0..be1c2463e5 100644
--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -49,6 +49,7 @@
 #include "nsNetUtil.h"
 #include "nsVariant.h"
 #include "nsPrintfCString.h"
+#include "mozilla/intl/LocaleService.h"
 
 // Helper Classes
 #include "nsJSUtils.h"
@@ -14794,6 +14795,17 @@ nsGlobalWindow::CreateWorklet(ErrorResult& aRv)
   return worklet.forget();
 }
 
+void
+nsGlobalWindow::GetAppLocales(nsTArray<nsString>& aLocales)
+{
+  nsTArray<nsCString> appLocales;
+  mozilla::intl::LocaleService::GetInstance()->GetAppLocales(appLocales);
+
+  for (uint32_t i = 0; i < appLocales.Length(); i++) {
+    aLocales.AppendElement(NS_ConvertUTF8toUTF16(appLocales[i]));
+  }
+}
+
 template class nsPIDOMWindow<mozIDOMWindowProxy>;
 template class nsPIDOMWindow<mozIDOMWindow>;
 template class nsPIDOMWindow<nsISupports>;