Don't delete leveldb directory if disk was full.

content/browser/indexed_db/indexed_db_backing_store.h

Index: content/browser/indexed_db/indexed_db_backing_store.h
diff --git a/content/browser/indexed_db/indexed_db_backing_store.h b/content/browser/indexed_db/indexed_db_backing_store.h
index 8fb5f721a909e7269a0ece363641d2525eb4ee3f..fef455f667acf005433eca99e863a184642f0c54 100644
--- a/content/browser/indexed_db/indexed_db_backing_store.h
+++ b/content/browser/indexed_db/indexed_db_backing_store.h
@@ -31,7 +31,8 @@ class LevelDBFactory {
   virtual ~LevelDBFactory() {}
   virtual scoped_ptr<LevelDBDatabase> OpenLevelDB(
       const base::FilePath& file_name,
-      const LevelDBComparator* comparator) = 0;
+      const LevelDBComparator* comparator,
+      bool* is_disk_full = NULL) = 0;
   virtual bool DestroyLevelDB(const base::FilePath& file_name) = 0;
 };