Updated error translation logic.

ios/web/web_state/error_translation_util.h

Index: ios/web/web_state/error_translation_util.h
diff --git a/ios/web/web_state/error_translation_util.h b/ios/web/web_state/error_translation_util.h
deleted file mode 100644
index 857b4aa604fa4b02717c938ec988eb26241bbe86..0000000000000000000000000000000000000000
--- a/ios/web/web_state/error_translation_util.h
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2015 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_WEB_STATE_ERROR_TRANSLATION_UTIL_H_
-#define IOS_WEB_WEB_STATE_ERROR_TRANSLATION_UTIL_H_
-
-#import <Foundation/Foundation.h>
-
-namespace web {
-
-// Translates iOS-specific errors into their net error equivalent.  If a valid
-// translation is found, a copy of |error| is returned with the translation as
-// its underlying error.  If there is no viable translation, the original error
-// is returned.
-NSError* NetErrorFromError(NSError* error);
-
-}  // namespace web
-
-#endif  // IOS_WEB_WEB_STATE_ERROR_TRANSLATION_UTIL_H_