Remove worker support of Web SQL Database.

Source/core/workers/WorkerGlobalScope.h

 /*
  * Copyright (C) 2008, 2009 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
@@ skipping 68 matching lines @@
     const KURL& url() const { return m_url; }
     KURL completeURL(const String&) const;
 
     virtual String userAgent(const KURL&) const OVERRIDE FINAL;
     virtual void disableEval(const String& errorMessage) OVERRIDE FINAL;
 
     WorkerScriptController* script() { return m_script.get(); }
     void clearScript() { m_script.clear(); }
     void clearInspector();
 
-    // FIXME: We can remove this interface when we remove openDatabaseSync.
-    class TerminationObserver {
-    public:
-        virtual ~TerminationObserver() { }
-        // The function is probably called in the main thread.
-        virtual void wasRequestedToTerminate() = 0;
-    };
-    void registerTerminationObserver(TerminationObserver*);
-    void wasRequestedToTerminate();
-
     void dispose();
 
     WorkerThread* thread() const { return m_thread; }
 
     virtual void postTask(PassOwnPtr<ExecutionContextTask>) OVERRIDE FINAL; // Executes the task on context's thread asynchronously.
 
     // WorkerGlobalScope
     WorkerGlobalScope* self() { return this; }
     WorkerConsole* console();
     WorkerLocation* location() const;
@@ skipping 66 matching lines @@
     WorkerThread* m_thread;
 
     RefPtrWillBeMember<WorkerInspectorController> m_workerInspectorController;
     bool m_closing;
 
     OwnPtrWillBeMember<WorkerEventQueue> m_eventQueue;
 
     OwnPtrWillBeMember<WorkerClients> m_workerClients;
 
     double m_timeOrigin;
-    TerminationObserver* m_terminationObserver;
 
     OwnPtrWillBeMember<ConsoleMessageStorage> m_messageStorage;
 };
 
 DEFINE_TYPE_CASTS(WorkerGlobalScope, ExecutionContext, context, context->isWorkerGlobalScope(), context.isWorkerGlobalScope());
 
 } // namespace blink
 
 #endif // WorkerGlobalScope_h