Remove worker support of Web SQL Database.

Source/modules/webdatabase/DatabaseContext.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 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 87 matching lines @@
     : ActiveDOMObject(context)
     , m_hasOpenDatabases(false)
     , m_hasRequestedTermination(false)
 {
     // ActiveDOMObject expects this to be called to set internal flags.
     suspendIfNeeded();
 
     // For debug accounting only. We must do this before we register the
     // instance. The assertions assume this.
     DatabaseManager::manager().didConstructDatabaseContext();
-    if (context->isWorkerGlobalScope())
-        toWorkerGlobalScope(context)->registerTerminationObserver(this);
 }
 
 DatabaseContext::~DatabaseContext()
 {
     // For debug accounting only. We must call this last. The assertions assume
     // this.
     DatabaseManager::manager().didDestructDatabaseContext();
 }
 
 void DatabaseContext::trace(Visitor* visitor)
 {
 #if ENABLE(OILPAN)
     visitor->trace(m_databaseThread);
-    visitor->trace(m_openSyncDatabases);
 #endif
 }
 
 // This is called if the associated ExecutionContext is destructing while
 // we're still associated with it. That's our cue to disassociate and shutdown.
 // To do this, we stop the database and let everything shutdown naturally
 // because the database closing process may still make use of this context.
 // It is not safe to just delete the context here.
 void DatabaseContext::contextDestroyed()
 {
     RefPtrWillBeRawPtr<DatabaseContext> protector(this);
     stopDatabases();
     DatabaseManager::manager().unregisterDatabaseContext(this);
     ActiveDOMObject::contextDestroyed();
 }
 
-void DatabaseContext::wasRequestedToTerminate()
-{
-    DatabaseManager::manager().interruptAllDatabasesForContext(this);
-}
-
 // stop() is from stopActiveDOMObjects() which indicates that the owner LocalFrame
 // or WorkerThread is shutting down. Initiate the orderly shutdown by stopping
 // the associated databases.
 void DatabaseContext::stop()
 {
     stopDatabases();
 }
 
 DatabaseContext* DatabaseContext::backend()
 {
@@ skipping 11 matching lines @@
 
         // Create the database thread on first request - but not if at least one database was already opened,
         // because in that case we already had a database thread and terminated it and should not create another.
         m_databaseThread = DatabaseThread::create();
         m_databaseThread->start();
     }
 
     return m_databaseThread.get();
 }
 
-void DatabaseContext::didOpenDatabase(DatabaseBackendBase& database)
-{
-    if (!database.isSyncDatabase())
-        return;
-    ASSERT(isContextThread());
-#if ENABLE(OILPAN)
-    m_openSyncDatabases.add(&database, adoptPtr(new DatabaseCloser(database)));
-#else
-    m_openSyncDatabases.add(&database);
-#endif
-}
-
-void DatabaseContext::didCloseDatabase(DatabaseBackendBase& database)
-{
-#if !ENABLE(OILPAN)
-    if (!database.isSyncDatabase())
-        return;
-    ASSERT(isContextThread());
-    m_openSyncDatabases.remove(&database);
-#endif
-}
-
-#if ENABLE(OILPAN)
-DatabaseContext::DatabaseCloser::~DatabaseCloser()
-{
-    if (m_database.opened())
-        m_database.closeDatabase();
-}
-#endif
-
-void DatabaseContext::stopSyncDatabases()
-{
-    // SQLite is "multi-thread safe", but each database handle can only be used
-    // on a single thread at a time.
-    //
-    // For DatabaseBackendSync, we open the SQLite database on the script
-    // context thread. And hence we should also close it on that same
-    // thread. This means that the SQLite database need to be closed here in the
-    // destructor.
-    ASSERT(isContextThread());
-#if ENABLE(OILPAN)
-    m_openSyncDatabases.clear();
-#else
-    Vector<DatabaseBackendBase*> syncDatabases;
-    copyToVector(m_openSyncDatabases, syncDatabases);
-    m_openSyncDatabases.clear();
-    for (size_t i = 0; i < syncDatabases.size(); ++i)
-        syncDatabases[i]->closeImmediately();
-#endif
-}
-
 void DatabaseContext::stopDatabases()
 {
-    stopSyncDatabases();
-
     // Though we initiate termination of the DatabaseThread here in
     // stopDatabases(), we can't clear the m_databaseThread ref till we get to
     // the destructor. This is because the Databases that are managed by
     // DatabaseThread still rely on this ref between the context and the thread
     // to execute the task for closing the database. By the time we get to the
     // destructor, we're guaranteed that the databases are destructed (which is
     // why our ref count is 0 then and we're destructing). Then, the
     // m_databaseThread RefPtr destructor will deref and delete the
     // DatabaseThread.
 
@@ skipping 18 matching lines @@
 {
     return executionContext()->securityOrigin();
 }
 
 bool DatabaseContext::isContextThread() const
 {
     return executionContext()->isContextThread();
 }
 
 } // namespace blink