Implemented new Translate API for purely Objective-C clients.

ios/web_view/internal/translate/cwv_translation_language_internal.h

Index: ios/web_view/internal/translate/cwv_translation_language_internal.h
diff --git a/ios/web_view/internal/translate/cwv_translation_language_internal.h b/ios/web_view/internal/translate/cwv_translation_language_internal.h
new file mode 100644
index 0000000000000000000000000000000000000000..f4d8cda91d92681f35a4d9c4751167beefac6e88
--- /dev/null
+++ b/ios/web_view/internal/translate/cwv_translation_language_internal.h
@@ -0,0 +1,26 @@
+// Copyright 2017 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.
+
+#ifndef IOS_WEB_VIEW_INTERNAL_TRANSLATE_CWV_TRANSLATION_LANGUAGE_INTERNAL_H
+#define IOS_WEB_VIEW_INTERNAL_TRANSLATE_CWV_TRANSLATION_LANGUAGE_INTERNAL_H
+
+#import "ios/web_view/public/cwv_translation_language.h"
+
+#include <string>
+
+#include "base/strings/string16.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface CWVTranslationLanguage ()
+
+- (instancetype)initWithLanguageCode:(const std::string&)languageCode
+                        languageName:(const base::string16&)languageName
+    NS_DESIGNATED_INITIALIZER;
+
+@end
+
+NS_ASSUME_NONNULL_END
+
+#endif  // IOS_WEB_VIEW_INTERNAL_TRANSLATE_CWV_TRANSLATION_LANGUAGE_INTERNAL_H