[background-sync] Remove WebSyncError and SyncCallbacks

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

Index: third_party/WebKit/Source/modules/background_sync/SyncError.h
diff --git a/third_party/WebKit/Source/modules/background_sync/SyncError.h b/third_party/WebKit/Source/modules/background_sync/SyncError.h
deleted file mode 100644
index d0bac744493e9ed2735317f9f0f142c955d948d9..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/modules/background_sync/SyncError.h
+++ /dev/null
@@ -1,26 +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 SyncError_h
-#define SyncError_h
-
-#include "core/dom/DOMException.h"
-#include "platform/heap/Handle.h"
-#include "public/platform/modules/background_sync/WebSyncError.h"
-#include "wtf/Allocator.h"
-
-namespace blink {
-
-class ScriptPromiseResolver;
-
-class SyncError {
-  STATIC_ONLY(SyncError);
-
- public:
-  static DOMException* take(ScriptPromiseResolver*, const WebSyncError&);
-};
-
-}  // namespace blink
-
-#endif  // SyncError_h