Oilpan: Prepare to move AbstractSQLTransactionBackend, SQLTransactionBackend, and SQLTransactionCoo…

Source/modules/webdatabase/DatabaseTask.h

Index: Source/modules/webdatabase/DatabaseTask.h
diff --git a/Source/modules/webdatabase/DatabaseTask.h b/Source/modules/webdatabase/DatabaseTask.h
index e6d1528ff0370301a3a7466ad4a6a4d4dcf565b1..cc9efafd0f0eefc65fe3d6f71b745d4e5c1047c1 100644
--- a/Source/modules/webdatabase/DatabaseTask.h
+++ b/Source/modules/webdatabase/DatabaseTask.h
@@ -142,7 +142,7 @@ public:
     virtual ~DatabaseTransactionTask();
 
     // Transaction task is never synchronous, so no 'synchronizer' parameter.
-    static PassOwnPtr<DatabaseTransactionTask> create(PassRefPtr<SQLTransactionBackend> transaction)
+    static PassOwnPtr<DatabaseTransactionTask> create(PassRefPtrWillBeRawPtr<SQLTransactionBackend> transaction)
     {
         return adoptPtr(new DatabaseTransactionTask(transaction));
     }
@@ -150,7 +150,7 @@ public:
     SQLTransactionBackend* transaction() const { return m_transaction.get(); }
 
 private:
-    explicit DatabaseTransactionTask(PassRefPtr<SQLTransactionBackend>);
+    explicit DatabaseTransactionTask(PassRefPtrWillBeRawPtr<SQLTransactionBackend>);
 
     virtual void doPerformTask() OVERRIDE;
     virtual void taskCancelled() OVERRIDE;
@@ -158,7 +158,7 @@ private:
     virtual const char* debugTaskName() const OVERRIDE;
 #endif
 
-    RefPtr<SQLTransactionBackend> m_transaction;
+    RefPtrWillBeCrossThreadPersistent<SQLTransactionBackend> m_transaction;
 };
 
 class DatabaseBackend::DatabaseTableNamesTask FINAL : public DatabaseTask {