cros: Move call js prefix out of ctor.

chrome/browser/ui/webui/chromeos/login/host_pairing_screen_handler.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 CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HOST_PAIRING_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HOST_PAIRING_SCREEN_HANDLER_H_
 
 #include "base/macros.h"
 #include "chrome/browser/chromeos/login/screens/host_pairing_screen_actor.h"
 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
@@ skipping 17 matching lines @@
 
   // Overridden from content::WebUIMessageHandler:
   void RegisterMessages() override;
 
   // Overridden from HostPairingScreenActor:
   void Show() override;
   void Hide() override;
   void SetDelegate(Delegate* delegate) override;
   void OnContextChanged(const base::DictionaryValue& diff) override;
 
-  HostPairingScreenActor::Delegate* delegate_;
-  bool show_on_init_;
-  bool js_context_ready_;
+  HostPairingScreenActor::Delegate* delegate_ = nullptr;
+  bool show_on_init_ = false;
+  bool js_context_ready_ = false;
 
   // Caches context changes while JS part is not ready to receive messages.
   ::login::ScreenContext context_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(HostPairingScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HOST_PAIRING_SCREEN_HANDLER_H_