The UI language rather than the locale is now used to pick Chrome's language ...

app/l10n_util_win.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef APP_L10N_UTIL_WIN_H_
 #define APP_L10N_UTIL_WIN_H_
 #pragma once
 
 #include <windows.h>
+#include <string>
+#include <vector>
 
 namespace l10n_util {
 
 // Returns the locale-dependent extended window styles.
 // This function is used for adding locale-dependent extended window styles
 // (e.g. WS_EX_LAYOUTRTL, WS_EX_RTLREADING, etc.) when creating a window.
 // Callers should OR this value into their extended style value when creating
 // a window.
 int GetExtendedStyles();
 
@@ skipping 20 matching lines @@
 
 // If the default UI font stored in |logfont| is not suitable, its family
 // and size are replaced with those stored in the per-locale resource.
 void AdjustUIFont(LOGFONT* logfont);
 
 // If the font for a given window (pointed to by HWND) is not suitable for the
 // UI in the current UI langauge, its family and size are replaced with those
 // stored in the per-locale resource.
 void AdjustUIFontForWindow(HWND hwnd);
 
+// Allow processes to override the configured locale with the user's Windows UI
+// languages.  This function should generally be called once early in
+// Application startup.
+void OverrideLocaleWithUILanguageList();
+
+// Retrieve the locale override, or an empty vector if the locale has not been
+// or failed to be overridden.
+const std::vector<std::string>& GetLocaleOverrides();
+
 }  // namespace l10n_util
 
 #endif  // APP_L10N_UTIL_WIN_H_