[oilpan] Move IDBDatabase, IDBDatabaseCallbacks, IDBDatabaseBackendInterface and other related clas…

Source/WebKit/chromium/src/WebIDBCallbacksImpl.h

Index: Source/WebKit/chromium/src/WebIDBCallbacksImpl.h
diff --git a/Source/WebKit/chromium/src/WebIDBCallbacksImpl.h b/Source/WebKit/chromium/src/WebIDBCallbacksImpl.h
index f5d806c5aa38d17caa0bdbb4143a19077688949c..234660e846f6e8d220cd9fcdfe723df354ffe5ee 100644
--- a/Source/WebKit/chromium/src/WebIDBCallbacksImpl.h
+++ b/Source/WebKit/chromium/src/WebIDBCallbacksImpl.h
@@ -27,6 +27,7 @@
 #define WebIDBCallbacksImpl_h
 
 #include "WebIDBCallbacks.h"
+#include "heap/Handle.h"
 #include <wtf/PassRefPtr.h>
 #include <wtf/RefPtr.h>
 
@@ -59,7 +60,7 @@ public:
 
 private:
     RefPtr<WebCore::IDBCallbacks> m_callbacks;
-    RefPtr<WebCore::IDBDatabaseBackendInterface> m_databaseProxy;
+    WebCore::Persistent<WebCore::IDBDatabaseBackendInterface> m_databaseProxy;
 };
 
 } // namespace WebKit