Use a two-part data format version in IndexedDB metadata.

content/browser/indexed_db/indexed_db_fake_backing_store.cc

 // Copyright 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_fake_backing_store.h"
 
 #include "base/files/file_path.h"
 #include "net/url_request/url_request_context_getter.h"
 
 namespace content {
 
 IndexedDBFakeBackingStore::IndexedDBFakeBackingStore()
     : IndexedDBBackingStore(NULL /* indexed_db_factory */,
                             url::Origin(GURL("http://localhost:81")),
                             base::FilePath(),
+                            IndexedDBDataFormatVersion(),
                             scoped_refptr<net::URLRequestContextGetter>(),
                             std::unique_ptr<LevelDBDatabase>(),
                             std::unique_ptr<LevelDBComparator>(),
                             NULL /* task_runner */) {}
 IndexedDBFakeBackingStore::IndexedDBFakeBackingStore(
     IndexedDBFactory* factory,
     base::SequencedTaskRunner* task_runner)
     : IndexedDBBackingStore(factory,
                             url::Origin(GURL("http://localhost:81")),
                             base::FilePath(),
+                            IndexedDBDataFormatVersion(),
                             NULL /* request_context */,
                             std::unique_ptr<LevelDBDatabase>(),
                             std::unique_ptr<LevelDBComparator>(),
                             task_runner) {}
 IndexedDBFakeBackingStore::~IndexedDBFakeBackingStore() {}
 
 std::vector<base::string16> IndexedDBFakeBackingStore::GetDatabaseNames(
     leveldb::Status* s) {
   *s = leveldb::Status::OK();
   return std::vector<base::string16>();
@@ skipping 184 matching lines @@
     scoped_refptr<BlobWriteCallback> callback) {
   callback->Run(IndexedDBBackingStore::BlobWriteResult::SUCCESS_SYNC);
   return leveldb::Status::OK();
 }
 leveldb::Status IndexedDBFakeBackingStore::FakeTransaction::CommitPhaseTwo() {
   return result_;
 }
 void IndexedDBFakeBackingStore::FakeTransaction::Rollback() {}
 
 }  // namespace content