Remove worker support of Web SQL Database.

Source/modules/webdatabase/DatabaseBackendSync.h

Index: Source/modules/webdatabase/DatabaseBackendSync.h
diff --git a/Source/modules/webdatabase/DatabaseBackendSync.h b/Source/modules/webdatabase/DatabaseBackendSync.h
deleted file mode 100644
index 4691095f230f625188a1e267520644ad811ccb5f..0000000000000000000000000000000000000000
--- a/Source/modules/webdatabase/DatabaseBackendSync.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * 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:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef DatabaseBackendSync_h
-#define DatabaseBackendSync_h
-
-#include "modules/webdatabase/DatabaseBackendBase.h"
-#include "wtf/text/WTFString.h"
-
-namespace blink {
-
-class DatabaseServer;
-
-// FIXME: This implementation of DatabaseBackendSync is only a place holder
-// for the split out of the DatabaseSync backend to be done later. This
-// place holder is needed to allow other code that need to reference the
-// DatabaseBackendSync to do so before the proper backend split is
-// available. This should be replaced with the actual implementation later.
-
-class DatabaseBackendSync : public DatabaseBackendBase {
-public:
-    virtual ~DatabaseBackendSync();
-    virtual void trace(Visitor*) OVERRIDE;
-
-    virtual bool openAndVerifyVersion(bool setVersionInNewDatabase, DatabaseError&, String& errorMessage) OVERRIDE FINAL;
-
-protected:
-    DatabaseBackendSync(DatabaseContext*, const String& name, const String& expectedVersion, const String& displayName, unsigned long estimatedSize);
-
-    friend class DatabaseServer;
-};
-
-} // namespace blink
-
-#endif // DatabaseBackendSync_h