Remove ScopedVector from ios/.

ios/web/public/webui/web_ui_ios.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_PUBLIC_WEBUI_WEB_UI_IOS_H_
 #define IOS_WEB_PUBLIC_WEBUI_WEB_UI_IOS_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 23 matching lines @@
       const std::vector<const base::Value*>& arg_list);
 
   virtual ~WebUIIOS() {}
 
   virtual web::WebState* GetWebState() const = 0;
 
   virtual WebUIIOSController* GetController() const = 0;
   virtual void SetController(WebUIIOSController* controller) = 0;
 
   // Takes ownership of |handler|, which will be destroyed when the WebUIIOS is.
-  virtual void AddMessageHandler(WebUIIOSMessageHandler* handler) = 0;
+  virtual void AddMessageHandler(
+      std::unique_ptr<WebUIIOSMessageHandler> handler) = 0;
 
   // Used by WebUIIOSMessageHandlers. If the given message is already
   // registered, the call has no effect unless |register_callback_overwrites_|
   // is set to true.
   typedef base::Callback<void(const base::ListValue*)> MessageCallback;
   virtual void RegisterMessageCallback(const std::string& message,
                                        const MessageCallback& callback) = 0;
 
   // This is only needed if an embedder overrides handling of a WebUIIOSMessage
   // and then later wants to undo that, or to route it to a different WebUIIOS
@@ skipping 22 matching lines @@
                                       const base::Value& arg3,
                                       const base::Value& arg4) = 0;
   virtual void CallJavascriptFunction(
       const std::string& function_name,
       const std::vector<const base::Value*>& args) = 0;
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_WEBUI_WEB_UI_IOS_H_