Moved window opening callback to WebStateDelegate.

ios/web/web_state/ui/crw_web_controller.mm

 // Copyright 2012 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/web_state/ui/crw_web_controller.h"
 
 #import <WebKit/WebKit.h>
 
 #import <objc/runtime.h>
 #include <stddef.h>
@@ skipping 4323 matching lines @@
   GURL requestURL = net::GURLWithNSURL(action.request.URL);
   if (!requestURL.is_empty() && !requestURL.is_valid()) {
     DLOG(WARNING) << "Unable to open a window with invalid URL: "
                   << requestURL.spec();
     return nil;
   }
 
   NSString* referrer = [self referrerFromNavigationAction:action];
   GURL openerURL =
       referrer ? GURL(base::SysNSStringToUTF8(referrer)) : _documentURL;
-  CRWWebController* child = [_delegate webController:self
-                           createWebControllerForURL:requestURL
-                                           openerURL:openerURL
-                                     initiatedByUser:[self userIsInteracting]];
-  DCHECK(!child || child.sessionController.openedByDOM);
+
+  WebState* childWebState = _webStateImpl->CreateNewWebState(
+      requestURL, openerURL, [self userIsInteracting]);
+  if (!childWebState)
+    return nil;
+
+  CRWWebController* childWebController =
+      static_cast<WebStateImpl*>(childWebState)->GetWebController();
+
+  DCHECK(!childWebController ||
+         childWebController.sessionController.openedByDOM);
 
   // WKWebView requires WKUIDelegate to return a child view created with
   // exactly the same |configuration| object (exception is raised if config is
   // different). |configuration| param and config returned by
   // WKWebViewConfigurationProvider are different objects because WKWebView
   // makes a shallow copy of the config inside init, so every WKWebView
   // owns a separate shallow copy of WKWebViewConfiguration.
-  [child ensureWebViewCreatedWithConfiguration:configuration];
-  return child.webView;
+  [childWebController ensureWebViewCreatedWithConfiguration:configuration];
+  return childWebController.webView;
 }
 
 - (void)webViewDidClose:(WKWebView*)webView {
   if (self.sessionController.openedByDOM) {
     [self.delegate webPageOrderedClose];
   }
 }
 
 - (void)webView:(WKWebView*)webView
     runJavaScriptAlertPanelWithMessage:(NSString*)message
@@ skipping 831 matching lines @@
 - (void)simulateLoadRequestWithURL:(const GURL&)URL {
   _lastRegisteredRequestURL = URL;
   _loadPhase = web::LOAD_REQUESTED;
 }
 
 - (NSString*)referrerFromNavigationAction:(WKNavigationAction*)action {
   return [action.request valueForHTTPHeaderField:kReferrerHeaderName];
 }
 
 @end