IndexedDB: Recycle cursor objects when calling continue().

content/browser/in_process_webkit/indexed_db_dispatcher_host.cc

Index: content/browser/in_process_webkit/indexed_db_dispatcher_host.cc
diff --git a/content/browser/in_process_webkit/indexed_db_dispatcher_host.cc b/content/browser/in_process_webkit/indexed_db_dispatcher_host.cc
index 86e3e4974dc0f4bab757aa93bcb639f4d2711f58..e379dc4c3a159d26a45dcf2db2e8699bf19a32ec 100644
--- a/content/browser/in_process_webkit/indexed_db_dispatcher_host.cc
+++ b/content/browser/in_process_webkit/indexed_db_dispatcher_host.cc
@@ -552,7 +552,7 @@ void IndexedDBDispatcherHost::IndexDispatcherHost::OnOpenObjectCursor(
 
   *ec = 0;
   scoped_ptr<WebIDBCallbacks> callbacks(
-      new IndexedDBCallbacks<WebIDBCursor>(parent_, params.response_id));
+      new IndexedDBCallbacks<WebIDBCursor>(parent_, params.response_id, -1));
   idb_index->openObjectCursor(
       WebIDBKeyRange(params.lower_key, params.upper_key, params.lower_open,
                      params.upper_open),
@@ -572,7 +572,7 @@ void IndexedDBDispatcherHost::IndexDispatcherHost::OnOpenKeyCursor(
 
   *ec = 0;
   scoped_ptr<WebIDBCallbacks> callbacks(
-      new IndexedDBCallbacks<WebIDBCursor>(parent_, params.response_id));
+      new IndexedDBCallbacks<WebIDBCursor>(parent_, params.response_id, -1));
   idb_index->openKeyCursor(
       WebIDBKeyRange(params.lower_key, params.upper_key, params.lower_open,
                      params.upper_open),
@@ -843,7 +843,7 @@ void IndexedDBDispatcherHost::ObjectStoreDispatcherHost::OnOpenCursor(
 
   *ec = 0;
   scoped_ptr<WebIDBCallbacks> callbacks(
-      new IndexedDBCallbacks<WebIDBCursor>(parent_, params.response_id));
+      new IndexedDBCallbacks<WebIDBCursor>(parent_, params.response_id, -1));
   idb_object_store->openCursor(
       WebIDBKeyRange(params.lower_key, params.upper_key, params.lower_open,
                      params.upper_open),
@@ -953,7 +953,8 @@ void IndexedDBDispatcherHost::CursorDispatcherHost::OnContinue(
 
   *ec = 0;
   idb_cursor->continueFunction(
-      key, new IndexedDBCallbacks<WebIDBCursor>(parent_, response_id), *ec);
+      key, new IndexedDBCallbacks<WebIDBCursor>(parent_, response_id,
+                                                cursor_id), *ec);
 }
 
 void IndexedDBDispatcherHost::CursorDispatcherHost::OnDelete(