Remove worker support of Web SQL Database.

Source/core/workers/WorkerGlobalScope.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009, 2011 Google 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
@@ skipping 71 matching lines @@
 WorkerGlobalScope::WorkerGlobalScope(const KURL& url, const String& userAgent, WorkerThread* thread, double timeOrigin, PassOwnPtrWillBeRawPtr<WorkerClients> workerClients)
     : m_url(url)
     , m_userAgent(userAgent)
     , m_script(adoptPtr(new WorkerScriptController(*this)))
     , m_thread(thread)
     , m_workerInspectorController(adoptRefWillBeNoop(new WorkerInspectorController(this)))
     , m_closing(false)
     , m_eventQueue(WorkerEventQueue::create(this))
     , m_workerClients(workerClients)
     , m_timeOrigin(timeOrigin)
-    , m_terminationObserver(0)
     , m_messageStorage(ConsoleMessageStorage::createForWorker(this))
 {
     setClient(this);
     setSecurityOrigin(SecurityOrigin::create(url));
     m_workerClients->reattachThread();
     m_thread->setWorkerInspectorController(m_workerInspectorController.get());
 }
 
 WorkerGlobalScope::~WorkerGlobalScope()
 {
@@ skipping 86 matching lines @@
 // FIXME: Called twice, from WorkerThreadShutdownFinishTask and WorkerGlobalScope::dispose.
 void WorkerGlobalScope::clearInspector()
 {
     if (!m_workerInspectorController)
         return;
     thread()->setWorkerInspectorController(nullptr);
     m_workerInspectorController->dispose();
     m_workerInspectorController.clear();
 }
 
-void WorkerGlobalScope::registerTerminationObserver(TerminationObserver* observer)
-{
-    ASSERT(!m_terminationObserver);
-    ASSERT(observer);
-    m_terminationObserver = observer;
-}
-
-void WorkerGlobalScope::wasRequestedToTerminate()
-{
-    if (m_terminationObserver)
-        m_terminationObserver->wasRequestedToTerminate();
-}
-
 void WorkerGlobalScope::dispose()
 {
     ASSERT(thread()->isCurrentThread());
 
     m_eventQueue->close();
     clearScript();
     clearInspector();
     setClient(0);
 
     // We do not clear the thread field of the
@@ skipping 124 matching lines @@
     visitor->trace(m_workerInspectorController);
     visitor->trace(m_eventQueue);
     visitor->trace(m_workerClients);
     visitor->trace(m_messageStorage);
     WillBeHeapSupplementable<WorkerGlobalScope>::trace(visitor);
     ExecutionContext::trace(visitor);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink