Revert r271097 - "Add most of the metadata-handling code for blobs."

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 d0064267c930b6d64d63661ee4123f2891f6bd5b..2de9b6d585db798e7ecc3fee710bae07de6e5bc0 100644
--- a/content/browser/indexed_db/indexed_db_leveldb_coding.cc
+++ b/content/browser/indexed_db/indexed_db_leveldb_coding.cc
@@ -46,8 +46,7 @@
 // <0, 0, 0, 2> => SerializedScriptValue version [DataVersionKey]
 // <0, 0, 0, 3>
 //   => Blob journal
-//     The format of the journal is:
-//         {database_id (var int), blobKey (var int)}*.
+//     The format of the journal is: {database_id, blobKey}*.
 //     If the blobKey is kAllBlobsKey, the whole database should be deleted.
 //     [BlobJournalKey]
 // <0, 0, 0, 4> => Live blob journal; same format. [LiveBlobJournalKey]