[ObjC ARC] Converts ios/chrome/browser/voice:voice to ARC.

ios/chrome/browser/voice/speech_input_locale_config_impl.mm

 // Copyright 2016 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 "ios/chrome/browser/voice/speech_input_locale_config_impl.h"
 
 #import <Foundation/Foundation.h>
 
 #include "base/mac/bundle_locations.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/strings/string_split.h"
 #include "base/strings/sys_string_conversions.h"
 #import "ios/chrome/browser/voice/speech_input_locale_match_config.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #include "ios/public/provider/chrome/browser/voice/voice_search_language.h"
 #include "ios/public/provider/chrome/browser/voice/voice_search_provider.h"
 
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
 namespace {
 
 // Returns the language portion of |locale_code|.
 std::string GetLanguageComponentForLocaleCode(const std::string& locale_code) {
   std::vector<std::string> tokens = base::SplitString(
       locale_code, "-", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
   if (tokens.empty())
     return std::string();
   return tokens[0];
 }
@@ skipping 157 matching lines @@
       }
     }
   }
 }
 
 void SpeechInputLocaleConfigImpl::InitializeTextToSpeechLangauges() {
   text_to_speech_languages_ = {"de", "en", "es", "fr", "it", "ja", "ko"};
 }
 
 }  // namespace voice