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

chrome/browser/browser_main_win.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/browser_main.h"
 #include "chrome/browser/browser_main_win.h"
 
 #include <windows.h>
 #include <shellapi.h>
 
 #include <algorithm>
 
 #include "app/l10n_util.h"
+#include "app/l10n_util_win.h"
 #include "app/win_util.h"
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/i18n/rtl.h"
 #include "base/nss_util.h"
 #include "base/path_service.h"
 #include "base/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
 #include "base/win/windows_version.h"
 #include "chrome/browser/browser_list.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/metrics/metrics_service.h"
 #include "chrome/browser/views/uninstall_view.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/env_vars.h"
+#include "chrome/common/main_function_params.h"
 #include "chrome/common/result_codes.h"
 #include "chrome/installer/util/helper.h"
 #include "chrome/installer/util/install_util.h"
 #include "chrome/installer/util/shell_util.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "net/base/winsock_init.h"
 #include "net/socket/ssl_client_socket_nss_factory.h"
 #include "views/focus/accelerator_handler.h"
 #include "views/window/window.h"
@@ skipping 171 matching lines @@
       : BrowserMainParts(parameters) {}
 
  protected:
   virtual void PreEarlyInitialization() {
     // Initialize Winsock.
     net::EnsureWinsockInit();
   }
 
   virtual void PreMainMessageLoopStart() {
     OleInitialize(NULL);
+
+    // If we're running tests (ui_task is non-null), then the ResourceBundle
+    // has already been initialized.
+    if (!parameters().ui_task) {
+      // Override the configured locale with the user's preferred UI language.
+      l10n_util::OverrideLocaleWithUILanguageList();
+    }
   }
 
  private:
   virtual void InitializeSSL() {
     // Use NSS for SSL by default.
     // Because of a build system issue (http://crbug.com/43461), the default
     // client socket factory uses SChannel (the system SSL library) for SSL by
     // default on Windows.
     if (!parsed_command_line().HasSwitch(switches::kUseSystemSSL)) {
       net::ClientSocketFactory::SetSSLClientSocketFactory(
           net::SSLClientSocketNSSFactory);
       // We want to be sure to init NSPR on the main thread.
       base::EnsureNSPRInit();
     }
   }
 };
 
 // static
 BrowserMainParts* BrowserMainParts::CreateBrowserMainParts(
     const MainFunctionParams& parameters) {
   return new BrowserMainPartsWin(parameters);
 }