Fixed navigation for displayed SSL interstitials.

ios/chrome/browser/tabs/tab.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/chrome/browser/tabs/tab.h"
 
 #import <CoreLocation/CoreLocation.h>
 #import <UIKit/UIKit.h>
 
 #include <utility>
@@ skipping 1851 matching lines @@
       (experimental_flags::IsTabSwitcherEnabled() ||
        !web::GetWebClient()->IsAppSpecificURL(lastCommittedURL));
   // Always take snapshot on iPhone.
   BOOL takeSnapshot = !IsIPadIdiom() || takeSnapshotOnIpad;
   if (loadSuccess && takeSnapshot) {
     [self updateSnapshotWithOverlay:YES visibleFrameOnly:YES];
   }
   [webControllerSnapshotHelper_ setSnapshotCoalescingEnabled:NO];
 }
 
+- (void)webState:(web::WebState*)webState
+    didChangeLoadingProgress:(double)progress {
+  // TODO(crbug.com/546406): It is probably possible to do something smarter,
+  // but the fact that this is not always sent will have to be taken into
+  // account.
+  [parentTabModel_ notifyTabChanged:self];
+}
+
+- (void)webStateDidDismissInterstitial:(web::WebState*)webState {
+  [parentTabModel_ notifyTabChanged:self];
+}
+
 - (void)webLoadCancelled:(const GURL&)url {
   // When a load is cancelled, this is the maximum that a page will ever load.
   [fullScreenController_ enableFullScreen];
   [parentTabModel_ notifyTabChanged:self];
 }
 
 - (BOOL)webController:(CRWWebController*)webController
     shouldOpenExternalURL:(const GURL&)URL {
   if (isPrerenderTab_ && !isLinkLoadingPrerenderTab_) {
     [delegate_ discardPrerender];
@@ skipping 429 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end