IndexedDB: Have IDBCursor and IDBRequest explicitly break ref cycles

Source/modules/indexeddb/IDBAny.cpp

Index: Source/modules/indexeddb/IDBAny.cpp
diff --git a/Source/modules/indexeddb/IDBAny.cpp b/Source/modules/indexeddb/IDBAny.cpp
index 62d30ae87065187a8517d0eb3f27f26560da99df..8d7b08c892696f4b02dc67bc5355055a051224d8 100644
--- a/Source/modules/indexeddb/IDBAny.cpp
+++ b/Source/modules/indexeddb/IDBAny.cpp
@@ -62,52 +62,52 @@ IDBAny::~IDBAny()
 {
 }
 
-PassRefPtr<DOMStringList> IDBAny::domStringList()
+DOMStringList* IDBAny::domStringList()
 {
     ASSERT(m_type == DOMStringListType);
-    return m_domStringList;
+    return m_domStringList.get();
 }
 
-PassRefPtr<IDBCursor> IDBAny::idbCursor()
+IDBCursor* IDBAny::idbCursor()
 {
     ASSERT(m_type == IDBCursorType);
-    return m_idbCursor;
+    return m_idbCursor.get();
 }
 
-PassRefPtr<IDBCursorWithValue> IDBAny::idbCursorWithValue()
+IDBCursorWithValue* IDBAny::idbCursorWithValue()
 {
     ASSERT(m_type == IDBCursorWithValueType);
-    return m_idbCursorWithValue;
+    return m_idbCursorWithValue.get();
 }
 
-PassRefPtr<IDBDatabase> IDBAny::idbDatabase()
+IDBDatabase* IDBAny::idbDatabase()
 {
     ASSERT(m_type == IDBDatabaseType);
-    return m_idbDatabase;
+    return m_idbDatabase.get();
 }
 
-PassRefPtr<IDBFactory> IDBAny::idbFactory()
+IDBFactory* IDBAny::idbFactory()
 {
     ASSERT(m_type == IDBFactoryType);
-    return m_idbFactory;
+    return m_idbFactory.get();
 }
 
-PassRefPtr<IDBIndex> IDBAny::idbIndex()
+IDBIndex* IDBAny::idbIndex()
 {
     ASSERT(m_type == IDBIndexType);
-    return m_idbIndex;
+    return m_idbIndex.get();
 }
 
-PassRefPtr<IDBObjectStore> IDBAny::idbObjectStore()
+IDBObjectStore* IDBAny::idbObjectStore()
 {
     ASSERT(m_type == IDBObjectStoreType);
-    return m_idbObjectStore;
+    return m_idbObjectStore.get();
 }
 
-PassRefPtr<IDBTransaction> IDBAny::idbTransaction()
+IDBTransaction* IDBAny::idbTransaction()
 {
     ASSERT(m_type == IDBTransactionType);
-    return m_idbTransaction;
+    return m_idbTransaction.get();
 }
 
 const ScriptValue& IDBAny::scriptValue()