[Translate] Factor out access to Accept-Languages

chrome/browser/translate/translate_service.cc

 // Copyright 2014 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/translate/translate_service.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/translate/chrome_translate_client.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "components/translate/core/browser/translate_download_manager.h"
 #include "components/translate/core/browser/translate_manager.h"
 #include "content/public/common/url_constants.h"
 #include "url/gurl.h"
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/file_manager/app_id.h"
 #include "extensions/common/constants.h"
@@ skipping 84 matching lines @@
     return true;
   return base::StartsWith(group_name, "Enabled", base::CompareCase::SENSITIVE);
 #else
   // The bubble UX is not implemented on other platforms.
   return false;
 #endif
 }
 
 // static
 std::string TranslateService::GetTargetLanguage(PrefService* prefs) {
-  std::vector<std::string> accept_languages_list = base::SplitString(
-      prefs->GetString(prefs::kAcceptLanguages), ",",
-      base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
-  return translate::TranslateManager::GetTargetLanguage(accept_languages_list);
+  return translate::TranslateManager::GetTargetLanguage(
+      ChromeTranslateClient::CreateTranslatePrefs(prefs).get());
 }
 
 // static
 bool TranslateService::IsTranslatableURL(const GURL& url) {
   // A URLs is translatable unless it is one of the following:
   // - empty (can happen for popups created with window.open(""))
   // - an internal URL (chrome:// and others)
   // - the devtools (which is considered UI)
   // - Chrome OS file manager extension
   // - an FTP page (as FTP pages tend to have long lists of filenames that may
   //   confuse the CLD)
   return !url.is_empty() && !url.SchemeIs(content::kChromeUIScheme) &&
          !url.SchemeIs(content::kChromeDevToolsScheme) &&
 #if defined(OS_CHROMEOS)
          !(url.SchemeIs(extensions::kExtensionScheme) &&
            url.DomainIs(file_manager::kFileManagerAppId)) &&
 #endif
          !url.SchemeIs(url::kFtpScheme);
 }