[ios] Added deprecation comments and TODOs for ios/web classes/protocols

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 web {
 class BlockedPopupInfo;
 struct Referrer;
 }
 
 // Methods implemented by the delegate of the CRWWebController.
+// DEPRECATED, do not conform to this protocol and do not add any methods to it.
+// Use web::WebStateDelegate instead.
+// TODO(crbug.com/674991): Remove this protocol.
 @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
 // wants to open a window with a new tab. |inBackground| allows a page to force
 // a new window to open in the background. CRWSessionController's openedByDOM
 // property of the returned CRWWebController must be YES.
 - (CRWWebController*)webPageOrderedOpen:(const GURL&)url
                                referrer:(const web::Referrer&)referrer
                              windowName:(NSString*)windowName
@@ skipping 158 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_