Replaced webPageOrderedClose with WebStateDelegate API.

ios/web/public/test/crw_mock_web_state_delegate.mm

 // Copyright 2016 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.
 
 #import "ios/web/public/test/crw_mock_web_state_delegate.h"
 
 #import "ios/web/public/web_state/context_menu_params.h"
 #import "ios/web/public/web_state/web_state.h"
 
 @implementation CRWMockWebStateDelegate {
   // Backs up the property with the same name.
   std::unique_ptr<web::WebState::OpenURLParams> _openURLParams;
   // Backs up the property with the same name.
   std::unique_ptr<web::ContextMenuParams> _contextMenuParams;
   // Backs up the property with the same name.
   BOOL _javaScriptDialogPresenterRequested;
 }
 
 @synthesize webState = _webState;
 @synthesize webStateCreationRequested = _webStateCreationRequested;
+@synthesize webStateClosingRequested = _webStateClosingRequested;
 @synthesize repostFormWarningRequested = _repostFormWarningRequested;
 @synthesize authenticationRequested = _authenticationRequested;
 
 - (web::WebState*)webState:(web::WebState*)webState
     createNewWebStateForURL:(const GURL&)URL
                   openerURL:(const GURL&)openerURL
             initiatedByUser:(BOOL)initiatedByUser {
   _webState = webState;
   _webStateCreationRequested = YES;
   return nil;
 }
 
+- (void)closeWebState:(web::WebState*)webState {
+  _webState = webState;
+  _webStateClosingRequested = YES;
+}
+
 - (web::WebState*)webState:(web::WebState*)webState
          openURLWithParams:(const web::WebState::OpenURLParams&)params {
   _webState = webState;
   _openURLParams.reset(new web::WebState::OpenURLParams(params));
   return webState;
 }
 
 - (BOOL)webState:(web::WebState*)webState
     handleContextMenu:(const web::ContextMenuParams&)params {
   _webState = webState;
@@ skipping 29 matching lines @@
 
 - (web::ContextMenuParams*)contextMenuParams {
   return _contextMenuParams.get();
 }
 
 - (BOOL)javaScriptDialogPresenterRequested {
   return _javaScriptDialogPresenterRequested;
 }
 
 @end