Cleanup ios/web_view.

ios/web_view/internal/translate/criwv_translate_manager_impl.h

 // 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.
 
 #ifndef IOS_WEB_VIEW_INTERNAL_TRANSLATE_CRIWV_TRANSLATE_MANAGER_IMPL_H_
 #define IOS_WEB_VIEW_INTERNAL_TRANSLATE_CRIWV_TRANSLATE_MANAGER_IMPL_H_
 
 #include <string>
 
-#include "base/memory/weak_ptr.h"
 #import "ios/web_view/public/criwv_translate_manager.h"
 
 namespace translate {
 class TranslateManager;
 }
 
 // CRIWVTranslateManagerImpl is mostly an Objective-C wrapper around
 // translate::TranslateUIDelegate.
 @interface CRIWVTranslateManagerImpl : NSObject<CRIWVTranslateManager>
 
+- (instancetype)init NS_UNAVAILABLE;
+
 // |manager| is expexted to outlive this CRIWVTranslateManagerImpl.
 - (instancetype)initWithTranslateManager:(translate::TranslateManager*)manager
                           sourceLanguage:(const std::string&)source
-                          targetLanguage:(const std::string&)target;
+                          targetLanguage:(const std::string&)target
+    NS_DESIGNATED_INITIALIZER;
 
 @end
 
 #endif  // IOS_WEB_VIEW_INTERNAL_TRANSLATE_CRIWV_TRANSLATE_MANAGER_IMPL_H_