Chrome OS: make language per user.

chrome/browser/chromeos/login/login_utils.cc

Index: chrome/browser/chromeos/login/login_utils.cc
diff --git a/chrome/browser/chromeos/login/login_utils.cc b/chrome/browser/chromeos/login/login_utils.cc
index 8d45a00f1668dc361b5571d16ff9ce5e6ac97e39..fba6b28aacf260d8bed4dc9d8352f3e02a27bdef 100644
--- a/chrome/browser/chromeos/login/login_utils.cc
+++ b/chrome/browser/chromeos/login/login_utils.cc
@@ -27,6 +27,7 @@
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 #include "chrome/browser/chromeos/login/cookie_fetcher.h"
 #include "chrome/browser/chromeos/login/google_authenticator.h"
+#include "chrome/browser/chromeos/login/language_switch_menu.h"
 #include "chrome/browser/chromeos/login/ownership_service.h"
 #include "chrome/browser/chromeos/login/parallel_authenticator.h"
 #include "chrome/browser/chromeos/login/user_image_downloader.h"
@@ -54,9 +55,8 @@ namespace chromeos {
 
 namespace {
 
-// Prefix for Auth token received from ClientLogin request.
+// Affixes for Auth token received from ClientLogin request.
 const char kAuthPrefix[] = "Auth=";
-// Suffix for Auth token received from ClientLogin request.
 const char kAuthSuffix[] = "\n";
 
 // Increase logging level for Guest mode to avoid LOG(INFO) messages in logs.
@@ -211,6 +211,18 @@ void LoginUtilsImpl::CompleteLogin(
   }
   btl->AddLoginTimeMarker("TPMOwned", false);
 
+  std::string pref_locale = profile->GetPrefs()->GetString(
+      prefs::kApplicationLocale);
+  if (pref_locale.empty()) {
+    if (first_login) {
+      profile->GetPrefs()->SetString(
+          prefs::kApplicationLocale,
+          g_browser_process->GetApplicationLocale());
+    }
+  } else {
+    LanguageSwitchMenu::SwitchLanguage(pref_locale);
+  }
+
   static const char kFallbackInputMethodLocale[] = "en-US";
   if (first_login) {
     std::string locale(g_browser_process->GetApplicationLocale());