Forward the application locale in the right format

Chromium expects bcp47.

Change-Id: I0403fe38e431bbc184d833009e9343235dc543d9
Reviewed-by: Andras Becsi <andras.becsi@theqtcompany.com>

src/core/content_browser_client_qt.cpp

@@ -437,7 +437,7 @@ content::LocationProvider *ContentBrowserClientQt::OverrideSystemLocationProvide
 
 std::string ContentBrowserClientQt::GetApplicationLocale()
 {
-    return QLocale().name().toStdString();
+    return QLocale().bcp47Name().toStdString();
 }
 
 content::DevToolsManagerDelegate* ContentBrowserClientQt::GetDevToolsManagerDelegate()