[Extensions] Convert some ChromeSyncExtensionFunctions

chrome/browser/extensions/api/i18n/i18n_api.cc

 // Copyright (c) 2012 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/extensions/api/i18n/i18n_api.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/lazy_instance.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_split.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/i18n.h"
 #include "chrome/common/pref_names.h"
 #include "components/prefs/pref_service.h"
 
 namespace GetAcceptLanguages = extensions::api::i18n::GetAcceptLanguages;
 
 namespace extensions {
 
 namespace {
 
 // Errors.
 static const char kEmptyAcceptLanguagesError[] = "accept-languages is empty.";
 
 }
 
-bool I18nGetAcceptLanguagesFunction::RunSync() {
-  std::string accept_languages =
-      GetProfile()->GetPrefs()->GetString(prefs::kAcceptLanguages);
+ExtensionFunction::ResponseAction I18nGetAcceptLanguagesFunction::Run() {
+  std::string accept_languages = Profile::FromBrowserContext(browser_context())
+                                     ->GetPrefs()
+                                     ->GetString(prefs::kAcceptLanguages);
   // Currently, there are 2 ways to set browser's accept-languages: through UI
   // or directly modify the preference file. The accept-languages set through
   // UI is guranteed to be valid, and the accept-languages string returned from
   // profile()->GetPrefs()->GetString(prefs::kAcceptLanguages) is guranteed to
   // be valid and well-formed, which means each accept-langauge is a valid
   // code, and accept-languages are seperatd by "," without surrrounding
   // spaces. But we do not do any validation (either the format or the validity
   // of the language code) on accept-languages set through editing preference
   // file directly. So, here, we're adding extra checks to be resistant to
   // crashes caused by data corruption.
-  if (accept_languages.empty()) {
-    error_ = kEmptyAcceptLanguagesError;
-    return false;
-  }
+  if (accept_languages.empty())
+    return RespondNow(Error(kEmptyAcceptLanguagesError));
 
   std::vector<std::string> languages = base::SplitString(
       accept_languages, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
   languages.erase(std::remove(languages.begin(), languages.end(), ""),
                   languages.end());
 
-  if (languages.empty()) {
-    error_ = kEmptyAcceptLanguagesError;
-    return false;
-  }
+  if (languages.empty())
+    return RespondNow(Error(kEmptyAcceptLanguagesError));
 
-  results_ = GetAcceptLanguages::Results::Create(languages);
-  return true;
+  return RespondNow(
+      ArgumentList(GetAcceptLanguages::Results::Create(languages)));
 }
 
 }  // namespace extensions