[ios] Removed CRWWebUserInterfaceDelegate usage from ios_web_shell.

ios/web/shell/view_controller.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/shell/view_controller.h"
 
 #include <stdint.h>
 
 #include <utility>
 
@@ skipping 16 matching lines @@
 #include "ios/web/web_state/ui/crw_web_controller.h"
 #include "ios/web/web_state/web_state_impl.h"
 #include "ui/base/page_transition_types.h"
 
 NSString* const kWebShellBackButtonAccessibilityLabel = @"Back";
 NSString* const kWebShellForwardButtonAccessibilityLabel = @"Forward";
 NSString* const kWebShellAddressFieldAccessibilityLabel = @"Address field";
 
 using web::NavigationManager;
 
-@interface ViewController ()<CRWWebStateObserver, CRWWebUserInterfaceDelegate> {
+@interface ViewController ()<CRWWebStateObserver> {
   web::BrowserState* _browserState;
   base::scoped_nsobject<CRWWebController> _webController;
   scoped_ptr<web::RequestTrackerFactoryImpl> _requestTrackerFactory;
   scoped_ptr<web::WebHTTPProtocolHandlerDelegate> _httpProtocolDelegate;
   scoped_ptr<web::WebStateObserverBridge> _webStateObserver;
 
   base::mac::ObjCPropertyReleaser _propertyReleaser_ViewController;
 }
 @property(nonatomic, assign, readonly) web::WebState* webState;
 @property(nonatomic, readwrite, retain) UITextField* field;
@@ skipping 64 matching lines @@
   [_toolbarView addSubview:forward];
   [_toolbarView addSubview:field];
 
   // Set up the network stack before creating the WebState.
   [self setUpNetworkStack];
 
   scoped_ptr<web::WebStateImpl> webState(new web::WebStateImpl(_browserState));
   webState->GetNavigationManagerImpl().InitializeSession(nil, nil, NO, 0);
   _webController.reset(web::CreateWebController(std::move(webState)));
   [_webController setDelegate:self];
-  [_webController setUIDelegate:self];
   [_webController setWebUsageEnabled:YES];
 
   _webStateObserver.reset(new web::WebStateObserverBridge(self.webState, self));
 
   UIView* view = self.webState->GetView();
   [view setFrame:[_containerView bounds]];
   [_containerView addSubview:view];
 
   NavigationManager::WebLoadParams params(GURL("https://dev.chromium.org/"));
   params.transition_type = ui::PAGE_TRANSITION_TYPED;
@@ skipping 232 matching lines @@
 }
 - (void)webWillFinishHistoryNavigationFromEntry:(CRWSessionEntry*)fromEntry {
 }
 - (int)downloadImageAtUrl:(const GURL&)url
             maxBitmapSize:(uint32_t)maxBitmapSize
                  callback:
                      (const web::WebState::ImageDownloadCallback&)callback {
   return -1;
 }
 
-// -----------------------------------------------------------------------
-// CRWWebUserInterfaceDelegate implementation.
-
-- (void)webController:(CRWWebController*)webController
-    runAuthDialogForProtectionSpace:(NSURLProtectionSpace*)protectionSpace
-                 proposedCredential:(NSURLCredential*)credential
-                  completionHandler:
-                      (void (^)(NSString* user, NSString* password))handler {
-  // Calling |handler| with nil objects is the same as not implemeting it. This
-  // method is implemented to make testing easier.
-  handler(nil, nil);
-}
-
 @end