ios: Cleanup class/struct forward declarations

ios/web/public/web_state/ui/crw_web_delegate.h

 // 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.
 
 #ifndef IOS_WEB_PUBLIC_WEB_STATE_UI_CRW_WEB_DELEGATE_H_
 #define IOS_WEB_PUBLIC_WEB_STATE_UI_CRW_WEB_DELEGATE_H_
 
 #include <stdint.h>
 #import <UIKit/UIKit.h>
 #include <vector>
 
 #include "base/ios/block_types.h"
 #include "ios/web/public/favicon_url.h"
 #import "ios/web/public/navigation_manager.h"
 #include "ios/web/public/ssl_status.h"
 #import "ios/web/public/web_state/ui/crw_native_content.h"
 #include "ios/web/public/web_state/web_state.h"
 #include "ui/base/page_transition_types.h"
 
 class GURL;
 @class CRWSessionEntry;
 @class CRWWebController;
 
-namespace net {
-class HttpResponseHeaders;
-class SSLInfo;
-class X509Certificate;
-}
-
 namespace web {
 class BlockedPopupInfo;
 struct Referrer;
 }
 
 // Methods implemented by the delegate of the CRWWebController.
 @protocol CRWWebDelegate<NSObject>
 
 // Called when the page wants to open a new window by DOM (e.g. with
 // |window.open| JavaScript call or by clicking a link with |_blank| target) or
@@ skipping 169 matching lines @@
 // Called when a PassKit file is downloaded. |data| should be the data from a
 // PassKit file, but this is not guaranteed, and the delegate is responsible for
 // error handling non PassKit data using -[PKPass initWithData:error:]. If the
 // download does not successfully complete, |data| will be nil.
 - (void)webController:(CRWWebController*)webController
     didLoadPassKitObject:(NSData*)data;
 
 @end
 
 #endif  // IOS_WEB_PUBLIC_WEB_STATE_UI_CRW_WEB_DELEGATE_H_