Remove worker support of Web SQL Database.

Source/modules/webdatabase/SQLTransactionSync.cpp

-/*
- * Copyright (C) 2010 Google Inc. All rights reserved.
- * Copyright (C) 2013 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
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- * notice, this list of conditions and the following disclaimer.
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- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
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- */
-
-#include "config.h"
-#include "modules/webdatabase/SQLTransactionSync.h"
-
-#include "core/dom/ExecutionContext.h"
-#include "modules/webdatabase/DatabaseSync.h"
-#include "modules/webdatabase/SQLTransactionSyncCallback.h"
-
-namespace blink {
-
-PassRefPtrWillBeRawPtr<SQLTransactionSync> SQLTransactionSync::create(DatabaseSync* db, PassOwnPtrWillBeRawPtr<SQLTransactionSyncCallback> callback, bool readOnly)
-{
-    return adoptRefWillBeNoop(new SQLTransactionSync(db, callback, readOnly));
-}
-
-SQLTransactionSync::SQLTransactionSync(DatabaseSync* db, PassOwnPtrWillBeRawPtr<SQLTransactionSyncCallback> callback, bool readOnly)
-    : SQLTransactionBackendSync(db, callback, readOnly)
-{
-    ASSERT(m_database->executionContext()->isContextThread());
-    db->observeTransaction(*this);
-}
-
-SQLTransactionSync* SQLTransactionSync::from(SQLTransactionBackendSync* backend)
-{
-    return static_cast<SQLTransactionSync*>(backend);
-}
-
-} // namespace blink