Rename ContextDestructionObserver to ContextLifecycleObserver

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 57 matching lines @@
 // live until after the ScriptExecutionContext destructs. This is true even if
 // we don't succeed in opening any Databases for that context. When we do
 // succeed in opening Databases for this ScriptExecutionContext, the Database
 // will re-use the same DatabaseContext.
 //
 // At Shutdown:
 // ===========
 // During shutdown, the DatabaseContext needs to:
 // 1. "outlive" the ScriptExecutionContext.
 //    - This is needed because the DatabaseContext needs to remove itself from the
-//      ScriptExecutionContext's ActiveDOMObject list and ContextDestructionObserver
+//      ScriptExecutionContext's ActiveDOMObject list and ContextLifecycleObserver
 //      list. This removal needs to be executed on the script's thread. Hence, we
 //      rely on the ScriptExecutionContext's shutdown process to call
 //      stop() and contextDestroyed() to give us a chance to clean these up from
 //      the script thread.
 //
 // 2. "outlive" the Databases.
 //    - This is because they may make use of the DatabaseContext to execute a close
 //      task and shutdown in an orderly manner. When the Databases are destructed,
 //      they will deref the DatabaseContext from the DatabaseThread.
 //
@@ skipping 108 matching lines @@
     if (m_scriptExecutionContext->isDocument()) {
         Document* document = toDocument(m_scriptExecutionContext);
         return document->page();
     }
     ASSERT(m_scriptExecutionContext->isWorkerContext());
     // allowDatabaseAccess is not yet implemented for workers.
     return true;
 }
 
 } // namespace WebCore