Removed CRWWebDelagate callbacks for load cancellation.

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

Index: ios/web/public/web_state/ui/crw_web_delegate.h
diff --git a/ios/web/public/web_state/ui/crw_web_delegate.h b/ios/web/public/web_state/ui/crw_web_delegate.h
index 01248eaf5c18266bb33150a576774b850f30c6fc..4ce10d42064828dc4e347a2343cbbe6c1d9dc924 100644
--- a/ios/web/public/web_state/ui/crw_web_delegate.h
+++ b/ios/web/public/web_state/ui/crw_web_delegate.h
@@ -40,11 +40,6 @@ class GURL;
 // 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;