IndexedDB: Enabled the LevelDB Bloom filter

content/browser/indexed_db/indexed_db_leveldb_coding.cc

Index: content/browser/indexed_db/indexed_db_leveldb_coding.cc
diff --git a/content/browser/indexed_db/indexed_db_leveldb_coding.cc b/content/browser/indexed_db/indexed_db_leveldb_coding.cc
index dcb1081b315eacd6b3d658fae2296a0a171f7b53..1f516c83852f5b695f8099b21a0cebfe66eed051 100644
--- a/content/browser/indexed_db/indexed_db_leveldb_coding.cc
+++ b/content/browser/indexed_db/indexed_db_leveldb_coding.cc
@@ -160,6 +160,9 @@
 // The sequence number is obsolete; it was used to allow two entries with the
 // same user (index) key in non-unique indexes prior to the inclusion of the
 // primary key in the data.
+//
+// Note: In order to be compatible with LevelDB's Bloom filter each bit of the
+// encoded key needs to used and "not ignored" by the comparator.
 
 using base::StringPiece;
 using blink::WebIDBKeyType;