Correctly update CWVWebView properties on state restoration.

ios/web_view/internal/cwv_web_view.mm

 // 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/public/cwv_web_view.h"
 
 #include <memory>
 #include <utility>
 
 #import "base/ios/weak_nsobject.h"
@@ skipping 355 matching lines @@
 
   _javaScriptDialogPresenter =
       base::MakeUnique<ios_web_view::WebViewJavaScriptDialogPresenter>(self,
                                                                        nullptr);
 
   _scrollView.proxy = _webState.get()->GetWebViewProxy().scrollViewProxy;
 
   _translationController.webState = _webState.get();
 
   [self addInternalWebViewAsSubview];
+
+  [self updateNavigationAvailability];
+  [self updateCurrentURLs];
+  self.loading = NO;
+  self.estimatedProgress = 0.0;
+  self.title = base::SysUTF16ToNSString(_webState->GetTitle());

[Hiroshi Ichikawa, 2017/06/13 07:40:11]

Optional: Maybe factor this out to -updateTitle method in analogous to
-updateCurrentUrls?

[Eugene But (OOO till 7-30), 2017/06/13 07:56:41]

Done.

 }
 
 // Adds the web view provided by |_webState| as a subview unless it has already.
 - (void)addInternalWebViewAsSubview {
   UIView* subview = _webState->GetView();
   if (subview.superview == self) {
     return;
   }
   subview.frame = self.bounds;
   subview.autoresizingMask =
       UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
   [self addSubview:subview];
 }
 
 - (void)updateNavigationAvailability {
   self.canGoBack = _webState && _webState->GetNavigationManager()->CanGoBack();
   self.canGoForward =
       _webState && _webState->GetNavigationManager()->CanGoForward();
 }
 
 - (void)updateCurrentURLs {
   self.lastCommittedURL = net::NSURLWithGURL(_webState->GetLastCommittedURL());
   self.visibleURL = net::NSURLWithGURL(_webState->GetVisibleURL());
 }
 
 @end