Revert of Revert of ChromeOS NetworkScreenHandler should not call CheckAndResolveLocale on UI thread. (patchs…

chrome/browser/chromeos/login/wizard_controller_browsertest.cc

Index: chrome/browser/chromeos/login/wizard_controller_browsertest.cc
diff --git a/chrome/browser/chromeos/login/wizard_controller_browsertest.cc b/chrome/browser/chromeos/login/wizard_controller_browsertest.cc
index 02f1e9d2f4ea75380caf4a34409d53e2d1395f61..c97fb4b2500f9d3681c954e7244b6e191a9b43e8 100644
--- a/chrome/browser/chromeos/login/wizard_controller_browsertest.cc
+++ b/chrome/browser/chromeos/login/wizard_controller_browsertest.cc
@@ -122,21 +122,15 @@
 };
 
 struct SwitchLanguageTestData {
-  SwitchLanguageTestData() : success(false), done(false) {}
-
-  std::string requested_locale;
-  std::string loaded_locale;
-  bool success;
+  SwitchLanguageTestData() : result("", "", false), done(false) {}
+
+  locale_util::LanguageSwitchResult result;
   bool done;
 };
 
 void OnLocaleSwitched(SwitchLanguageTestData* self,
-                      const std::string& locale,
-                      const std::string& loaded_locale,
-                      const bool success) {
-  self->requested_locale = locale;
-  self->loaded_locale = loaded_locale;
-  self->success = success;
+                      const locale_util::LanguageSwitchResult& result) {
+  self->result = result;
   self->done = true;
 }
 
@@ -144,18 +138,17 @@
                                   const std::string& expected_locale,
                                   const bool expect_success) {
   SwitchLanguageTestData data;
-  scoped_ptr<locale_util::SwitchLanguageCallback> callback(
-      new locale_util::SwitchLanguageCallback(
-          base::Bind(&OnLocaleSwitched, base::Unretained(&data))));
-  locale_util::SwitchLanguage(locale, true, false, callback.Pass());
+  locale_util::SwitchLanguageCallback callback(
+      base::Bind(&OnLocaleSwitched, base::Unretained(&data)));
+  locale_util::SwitchLanguage(locale, true, false, callback);
 
   // Token writing moves control to BlockingPool and back.
   content::RunAllBlockingPoolTasksUntilIdle();
 
   EXPECT_EQ(data.done, true);
-  EXPECT_EQ(data.requested_locale, locale);
-  EXPECT_EQ(data.loaded_locale, expected_locale);
-  EXPECT_EQ(data.success, expect_success);
+  EXPECT_EQ(data.result.requested_locale, locale);
+  EXPECT_EQ(data.result.loaded_locale, expected_locale);
+  EXPECT_EQ(data.result.success, expect_success);
 }
 
 void SetUpCrasAndEnableChromeVox(int volume_percent, bool mute_on) {