Pass the correct webState to the nativeContent.

ios/chrome/browser/ui/contextual_search/contextual_search_results_view.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.
 
 #include "ios/chrome/browser/ui/contextual_search/contextual_search_results_view.h"
 
 #include <memory>
 
 #import "base/ios/weak_nsobject.h"
 #include "base/mac/scoped_nsobject.h"
@@ skipping 316 matching lines @@
 #pragma mark - CRWNativeContentProvider methods
 
 // Native pages should never be loaded this way.
 - (BOOL)hasControllerForURL:(const GURL&)url {
   NOTREACHED();
   [self cancelLoad];
   return NO;
 }
 
 // Native pages should never be loaded this way.
-- (id<CRWNativeContent>)controllerForURL:(const GURL&)url {
+- (id<CRWNativeContent>)controllerForURL:(const GURL&)url
+                                webState:(web::WebState*)webState {
   NOTREACHED();
   [self cancelLoad];
   return nil;
 }
 
 - (id<CRWNativeContent>)controllerForURL:(const GURL&)url
                                withError:(NSError*)error
                                   isPost:(BOOL)isPost {
   // Display the error page in the contextual search tab.
   _loadingError = YES;
   [self displayTab];
 
   [[_webViewProxy scrollViewProxy] setScrollEnabled:NO];
   id errorController =
       [self.opener.webController.nativeProvider controllerForURL:url
                                                        withError:error
                                                           isPost:isPost];
 
   if ([errorController respondsToSelector:@selector(setScrollEnabled:)]) {
     [errorController setScrollEnabled:NO];
   }
   return errorController;
 }
 
 @end