Update ios/web_view/shell UIDelegate implementation.

ios/web_view/shell/shell_view_controller.m

 // 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.
 
 #import "ios/web_view/shell/shell_view_controller.h"
 
 #import <MobileCoreServices/MobileCoreServices.h>
 
 #import "ios/web_view/public/cwv.h"
 #import "ios/web_view/public/cwv_html_element.h"
+#import "ios/web_view/public/cwv_navigation_action.h"
 #import "ios/web_view/public/cwv_navigation_delegate.h"
 #import "ios/web_view/public/cwv_ui_delegate.h"
 #import "ios/web_view/public/cwv_web_view.h"
 #import "ios/web_view/shell/translate_controller.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 // Externed accessibility identifier.
@@ skipping 111 matching lines @@
                 action:@selector(stopLoading)
       forControlEvents:UIControlEventTouchUpInside];
 
   [_toolbar addSubview:back];
   [_toolbar addSubview:forward];
   [_toolbar addSubview:stop];
   [_toolbar addSubview:_field];
 
   self.webView = [CWV webViewWithFrame:[_containerView bounds]];
   _webView.navigationDelegate = self;
+  _webView.UIDelegate = self;
   _translateController = [[TranslateController alloc] init];
   _webView.translationDelegate = _translateController;
 
   [_webView setAutoresizingMask:UIViewAutoresizingFlexibleWidth |
                                 UIViewAutoresizingFlexibleHeight];
   [_containerView addSubview:_webView];
 
   NSURLRequest* request = [NSURLRequest
       requestWithURL:[NSURL URLWithString:@"https://www.google.com/"]];
   [_webView loadRequest:request];
@@ skipping 35 matching lines @@
   // Do not update the URL if the text field is currently being edited.
   if ([_field isFirstResponder]) {
     return;
   }
 
   [_field setText:[[_webView visibleURL] absoluteString]];
 }
 
 #pragma mark CWVUIDelegate methods
 
+- (CWVWebView*)webView:(CWVWebView*)webView
+    createWebViewWithConfiguration:(CWVWebViewConfiguration*)configuration
+               forNavigationAction:(CWVNavigationAction*)action {
+  NSLog(@"Create new CWVWebView for %@. User initiated? %@", action.request.URL,
+        action.userInitiated ? @"Yes" : @"No");
+  return nil;
+}
+
+- (void)webViewDidClose:(CWVWebView*)webView {
+  NSLog(@"webViewDidClose");
+}
+
 - (void)webView:(CWVWebView*)webView
     runContextMenuWithTitle:(NSString*)menuTitle
              forHTMLElement:(CWVHTMLElement*)element
                      inView:(UIView*)view
         userGestureLocation:(CGPoint)location {
   if (!element.hyperlink) {
     return;
   }
 
   UIAlertController* alert = [UIAlertController
@@ skipping 127 matching lines @@
   // TODO(crbug.com/679895): Add some visual indication that the page load has
   // finished.
   [self updateToolbar];
 }
 
 - (void)webViewWebContentProcessDidTerminate:(CWVWebView*)webView {
   NSLog(@"webViewWebContentProcessDidTerminate");
 }
 
 @end