Add IndexedDBBlobInfo class, to be used for IDB Blob support.

content/browser/indexed_db/indexed_db_leveldb_coding.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/indexed_db/indexed_db_leveldb_coding.h"
 
 #include <iterator>
 #include <limits>
 
 #include "base/logging.h"
@@ skipping 1382 matching lines @@
 int DatabaseNameKey::Compare(const DatabaseNameKey& other) {
   if (int x = origin_.compare(other.origin_))
     return x;
   return database_name_.compare(other.database_name_);
 }
 
 bool DatabaseMetaDataKey::IsValidBlobKey(int64 blob_key) {
   return blob_key >= kBlobKeyGeneratorInitialNumber;
 }
 
+const int64 DatabaseMetaDataKey::kAllBlobsKey = 1;
+const int64 DatabaseMetaDataKey::kBlobKeyGeneratorInitialNumber = 2;
+const int64 DatabaseMetaDataKey::kInvalidBlobKey = -1;
+
 std::string DatabaseMetaDataKey::Encode(int64 database_id,
                                         MetaDataType meta_data_type) {
   KeyPrefix prefix(database_id);
   std::string ret = prefix.Encode();
   ret.push_back(meta_data_type);
   return ret;
 }
 
 ObjectStoreMetaDataKey::ObjectStoreMetaDataKey()
     : object_store_id_(-1), meta_data_type_(-1) {}
@@ skipping 590 matching lines @@
 scoped_ptr<IndexedDBKey> IndexDataKey::primary_key() const {
   scoped_ptr<IndexedDBKey> key;
   StringPiece slice(encoded_primary_key_);
   if (!DecodeIDBKey(&slice, &key)) {
     // TODO(jsbell): Return error.
   }
   return key.Pass();
 }
 
 }  // namespace content