Removed CRWWebDelagate callbacks for load cancellation.

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>
@@ skipping 22 matching lines @@
 // to track if this call was a result of user action or not. Returns YES iff
 // |URL| is launched in an external app.
 - (BOOL)openExternalURL:(const GURL&)URL linkClicked:(BOOL)linkClicked;
 
 // This method is invoked whenever the system believes the URL is about to
 // change, or immediately after any unexpected change of the URL, prior to
 // updating the navigation manager's pending entry.
 // Phase will be LOAD_REQUESTED.
 - (void)webWillAddPendingURL:(const GURL&)url
                   transition:(ui::PageTransition)transition;
-// Called when webWillStartLoadingURL was called, but something went wrong.
-- (void)webCancelStartLoadingRequest;
-// Called when the page load was cancelled by page activity (before a success /
-// failure state is known). Phase will be PAGE_LOADED.
-- (void)webLoadCancelled:(const GURL&)url;
 // Called when a placeholder image should be displayed instead of the WebView.
 - (void)webController:(CRWWebController*)webController
     retrievePlaceholderOverlayImage:(void (^)(UIImage*))block;
 
 // ---------------------------------------------------------------------
 // TODO(rohitrao): Eliminate as many of the following delegate methods as
 // possible.  They only exist because the Tab and CRWWebController logic was
 // very intertwined. We should streamline the logic to jump between classes
 // less, then remove any delegate method that becomes unneccessary as a result.
 
@@ skipping 64 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_