Remove get from CrossThreadPersistent to avoid accidental use

third_party/WebKit/Source/modules/webdatabase/DatabaseTask.h

 /*
  * 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 32 matching lines @@
 
 namespace blink {
 
 class DatabaseTask {
     WTF_MAKE_NONCOPYABLE(DatabaseTask); USING_FAST_MALLOC(DatabaseTask);
 public:
     virtual ~DatabaseTask();
 
     void run();
 
-    Database* database() const { return m_database.get(); }
+    const CrossThreadPersistent<Database>& database() const { return m_database; }
 #if ENABLE(ASSERT)
     bool hasSynchronizer() const { return m_synchronizer; }
 #endif
 
 protected:
     DatabaseTask(Database*, TaskSynchronizer*);
 
 private:
     virtual void doPerformTask() = 0;
     virtual void taskCancelled() { }
@@ skipping 47 matching lines @@
 class Database::DatabaseTransactionTask final : public DatabaseTask {
 public:
     ~DatabaseTransactionTask() override;
 
     // Transaction task is never synchronous, so no 'synchronizer' parameter.
     static PassOwnPtr<DatabaseTransactionTask> create(SQLTransactionBackend* transaction)
     {
         return adoptPtr(new DatabaseTransactionTask(transaction));
     }
 
-    SQLTransactionBackend* transaction() const { return m_transaction.get(); }
+    CrossThreadPersistent<SQLTransactionBackend> transaction() const { return m_transaction; }

[sof, 2016/06/02 07:00:11]

You're creating a CrossThreadPersistent<> here, is that what you want & need?

 
 private:
     explicit DatabaseTransactionTask(SQLTransactionBackend*);
 
     void doPerformTask() override;
     void taskCancelled() override;
 #if !LOG_DISABLED
     const char* debugTaskName() const override;
 #endif
 
@@ skipping 14 matching lines @@
 #if !LOG_DISABLED
     const char* debugTaskName() const override;
 #endif
 
     Vector<String>& m_tableNames;
 };
 
 } // namespace blink
 
 #endif // DatabaseTask_h