Removed webControllerDidSuppressDialog: callback.

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 1882 matching lines @@
           respondsToSelector:@selector(willUpdateSnapshot)]) {
     [[self.webController nativeController] willUpdateSnapshot];
   }
   [overscrollActionsController_ clear];
 }
 
 - (void)setWebUsageEnabled:(BOOL)webUsageEnabled {
   [self.webController setWebUsageEnabled:webUsageEnabled];
 }
 
-- (void)webControllerDidSuppressDialog:(id)webController {
+- (void)webStateDidSuppressDialog:(web::WebState*)webState {
   DCHECK(isPrerenderTab_);
   [delegate_ discardPrerender];
 }
 
 - (CGFloat)headerHeightForWebController:(CRWWebController*)webController {
   return [self.tabHeadersDelegate headerHeightForTab:self];
 }
 
 - (void)webStateDidChangeVisibleSecurityState:(web::WebState*)webState {
   // Disable fullscreen if SSL cert is invalid.
@@ skipping 190 matching lines @@
 
 - (TabModel*)parentTabModel {
   return parentTabModel_;
 }
 
 - (FormInputAccessoryViewController*)inputAccessoryViewController {
   return inputAccessoryViewController_.get();
 }
 
 @end