Cleaned up handleLoadError:forNavigation: method (code duplication)

Removed code duplication for these calls:
[self loadCompleteWithSuccess:NO forNavigation:navigation];
[self loadErrorInNativeView:error navigationContext:navigationContext];

Bug: None
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: Ie550a088fefb154c13bc0409eaf7772b1d14b4c4
Reviewed-on: https://chromium-review.googlesource.com/757823Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Commit-Queue: Kurt Horimoto <kkhorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#516086}

ios/web/web_state/ui/crw_web_controller.mm

@@ -2944,17 +2944,13 @@ registerLoadRequestForURL:(const GURL&)requestURL
     // The wrapper error uses the URL of the error and not the requested URL
     // (which can be different in case of a redirect) to match desktop Chrome
     // behavior.
-    NSError* wrapperError = [NSError
-        errorWithDomain:[error domain]
-                   code:[error code]
+    error = [NSError
+        errorWithDomain:error.domain
+                   code:error.code
                userInfo:@{
-                 NSURLErrorFailingURLStringErrorKey : [errorURL absoluteString],
-                 NSUnderlyingErrorKey : error
+                 NSURLErrorFailingURLStringErrorKey : errorURL.absoluteString,
+                 NSUnderlyingErrorKey : error,
                }];
-    [self loadCompleteWithSuccess:NO forNavigation:navigation];
-    [self loadErrorInNativeView:wrapperError
-              navigationContext:navigationContext];
-    return;
   }
 
   [self loadCompleteWithSuccess:NO forNavigation:navigation];