Replaced webPageOrderedClose with WebStateDelegate API.

ios/web/web_state/web_state_impl.h

 // Copyright 2013 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_WEB_STATE_WEB_STATE_IMPL_H_
 #define IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 243 matching lines @@
                            const DialogClosedCallback& callback);
 
   // Instructs the delegate to create a new web state. Called when this WebState
   // wants to open a new window. |url| is the URL of the new window;
   // |opener_url| is the URL of the page which requested a window to be open;
   // |initiated_by_user| is true if action was caused by the user.
   WebState* CreateNewWebState(const GURL& url,
                               const GURL& opener_url,
                               bool initiated_by_user);
 
+  // Instructs the delegate to close this web state. Called when the page calls
+  // wants to close self by calling window.close() JavaScript API.
+  virtual void CloseWebState();
+
   // Notifies the delegate that request receives an authentication challenge
   // and is unable to respond using cached credentials.
   void OnAuthRequired(NSURLProtectionSpace* protection_space,
                       NSURLCredential* proposed_credential,
                       const WebStateDelegate::AuthCallback& callback);
 
   // Cancels all dialogs associated with this web_state.
   void CancelDialogs();
 
   // NavigationManagerDelegate:
@@ skipping 86 matching lines @@
 
   // Mojo interface registry for this WebState.
   std::unique_ptr<service_manager::InterfaceRegistry> mojo_interface_registry_;
 
   DISALLOW_COPY_AND_ASSIGN(WebStateImpl);
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_WEB_STATE_WEB_STATE_IMPL_H_