Removed TODO(crbug.com/677354).

ios/web/web_state/ui/crw_wk_navigation_states.mm

 // Copyright 2016 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_wk_navigation_states.h"
 
 #include "base/logging.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
@@ skipping 51 matching lines @@
 }
 
 - (NSString*)description {
   return [NSString stringWithFormat:@"records: %@, lastAddedNavigation: %@",
                                     _records, self.lastAddedNavigation];
 }
 
 - (void)setState:(web::WKNavigationState)state
     forNavigation:(WKNavigation*)navigation {
   if (!navigation) {
-    // WKWebView may call WKNavigationDelegate callbacks with nil
-    // |WKNavigation|. TODO(crbug.com/677354): Remove this once WKWebView bug
-    // is fixed.
+    // WKWebView may call WKNavigationDelegate callbacks with nil.
     return;
   }
 
   CRWWKNavigationsStateRecord* record = [_records objectForKey:navigation];
   if (!record) {
     DCHECK(state == web::WKNavigationState::REQUESTED ||
            state == web::WKNavigationState::STARTED ||
            state == web::WKNavigationState::COMMITTED);
     record =
         [[CRWWKNavigationsStateRecord alloc] initWithState:state
@@ skipping 23 matching lines @@
 - (web::WKNavigationState)lastAddedNavigationState {
   CRWWKNavigationsStateRecord* lastAddedRecord = nil;
   WKNavigation* lastAddedNavigation = [self lastAddedNavigation];
   if (lastAddedNavigation)
     lastAddedRecord = [_records objectForKey:lastAddedNavigation];
 
   return lastAddedRecord.state;
 }
 
 @end