Moved window opening callback to WebStateDelegate.

ios/web/web_state/web_state_impl.mm

 // 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.
 
 #import "ios/web/web_state/web_state_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/logging.h"
@@ skipping 488 matching lines @@
   JavaScriptDialogPresenter* presenter =
       delegate_ ? delegate_->GetJavaScriptDialogPresenter(this) : nullptr;
   if (!presenter) {
     callback.Run(false, nil);
     return;
   }
   presenter->RunJavaScriptDialog(this, origin_url, javascript_dialog_type,
                                  message_text, default_prompt_text, callback);
 }
 
+WebState* WebStateImpl::CreateNewWebState(const GURL& url,
+                                          const GURL& opener_url,
+                                          bool initiated_by_user) {
+  if (delegate_) {
+    return delegate_->CreateNewWebState(this, url, opener_url,
+                                        initiated_by_user);
+  }
+  return nullptr;
+}
+
 void WebStateImpl::OnAuthRequired(
     NSURLProtectionSpace* protection_space,
     NSURLCredential* proposed_credential,
     const WebStateDelegate::AuthCallback& callback) {
   if (delegate_) {
     delegate_->OnAuthRequired(this, protection_space, proposed_credential,
                               callback);
   } else {
     callback.Run(nil, nil);
   }
@@ skipping 213 matching lines @@
     const LoadCommittedDetails& load_details) {
   for (auto& observer : observers_)
     observer.NavigationItemCommitted(load_details);
 }
 
 WebState* WebStateImpl::GetWebState() {
   return this;
 }
 
 }  // namespace web