Oilpan: Prepare to move DatabaseContext to Oilpan heap.

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 69 matching lines @@
 //      they will deref the DatabaseContext from the DatabaseThread.
 //
 // During shutdown, the ExecutionContext is shutting down on the script thread
 // while the Databases are shutting down on the DatabaseThread. Hence, there can be
 // a race condition as to whether the ExecutionContext or the Databases
 // destruct first.
 //
 // The RefPtrs in the Databases and ExecutionContext will ensure that the
 // DatabaseContext will outlive both regardless of which of the 2 destructs first.
 
-PassRefPtr<DatabaseContext> DatabaseContext::create(ExecutionContext* context)
+PassRefPtrWillBeRawPtr<DatabaseContext> DatabaseContext::create(ExecutionContext* context)
 {
-    RefPtr<DatabaseContext> self = adoptRef(new DatabaseContext(context));
+    RefPtrWillBeRawPtr<DatabaseContext> self = adoptRefWillBeNoop(new DatabaseContext(context));
     DatabaseManager::manager().registerDatabaseContext(self.get());
     return self.release();
 }
 
 DatabaseContext::DatabaseContext(ExecutionContext* context)
     : 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();
 }
 
 DatabaseContext::~DatabaseContext()
 {
-    ASSERT(!m_databaseThread || m_databaseThread->terminationRequested());
-
     // For debug accounting only. We must call this last. The assertions assume
     // this.
     DatabaseManager::manager().didDestructDatabaseContext();
 }
 
+void DatabaseContext::trace(Visitor* visitor)
+{
+    visitor->trace(m_databaseThread);
+    visitor->trace(m_openSyncDatabases);
+}
+
 // 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()
 {
-    RefPtr<DatabaseContext> protector(this);
+    RefPtrWillBeRawPtr<DatabaseContext> protector(this);
     stopDatabases();
     DatabaseManager::manager().unregisterDatabaseContext(this);
     ActiveDOMObject::contextDestroyed();
 }
 
 void DatabaseContext::willStop()
 {
     DatabaseManager::manager().interruptAllDatabasesForContext(this);
 }
 
@@ skipping 118 matching lines @@
 {
     return executionContext()->securityOrigin();
 }
 
 bool DatabaseContext::isContextThread() const
 {
     return executionContext()->isContextThread();
 }
 
 } // namespace WebCore