[background-sync] Remove WebSyncError and SyncCallbacks

third_party/WebKit/Source/modules/background_sync/SyncError.cpp

-// 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.
-
-#include "modules/background_sync/SyncError.h"
-
-#include "core/dom/DOMException.h"
-#include "core/dom/ExceptionCode.h"
-
-namespace blink {
-
-DOMException* SyncError::take(ScriptPromiseResolver*,
-                              const WebSyncError& webError) {
-  switch (webError.errorType) {
-    case WebSyncError::ErrorTypeAbort:
-      return DOMException::create(AbortError, webError.message);
-    case WebSyncError::ErrorTypeNoPermission:
-      return DOMException::create(InvalidAccessError, webError.message);
-    case WebSyncError::ErrorTypeNotFound:
-      return DOMException::create(NotFoundError, webError.message);
-    case WebSyncError::ErrorTypePermissionDenied:
-      return DOMException::create(PermissionDeniedError, webError.message);
-    case WebSyncError::ErrorTypeUnknown:
-      return DOMException::create(UnknownError, webError.message);
-  }
-  ASSERT_NOT_REACHED();
-  return DOMException::create(UnknownError);
-}
-
-}  // namespace blink