Rename DatabaseTaskSynchronizer to TaskSynchronizer and move it to platform/

Source/modules/webdatabase/Database.cpp

 /*
  * Copyright (C) 2007, 2008, 2013 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
@@ skipping 197 matching lines @@
     }
 
     return tableNames;
 }
 
 Vector<String> Database::tableNames()
 {
     // FIXME: Not using isolatedCopy on these strings looks ok since threads take strict turns
     // in dealing with them. However, if the code changes, this may not be true anymore.
     Vector<String> result;
-    DatabaseTaskSynchronizer synchronizer;
+    TaskSynchronizer synchronizer;
     if (!databaseContext()->databaseThread() || databaseContext()->databaseThread()->terminationRequested(&synchronizer))
         return result;
 
     OwnPtr<DatabaseTableNamesTask> task = DatabaseTableNamesTask::create(this, &synchronizer, result);
     databaseContext()->databaseThread()->scheduleTask(task.release());
     synchronizer.waitForTaskCompletion();
 
     return result;
 }
 
@@ skipping 11 matching lines @@
     backend()->reportStartTransactionResult(errorSite, webSqlErrorCode, sqliteErrorCode);
 }
 
 void Database::reportCommitTransactionResult(int errorSite, int webSqlErrorCode, int sqliteErrorCode)
 {
     backend()->reportCommitTransactionResult(errorSite, webSqlErrorCode, sqliteErrorCode);
 }
 
 
 } // namespace WebCore