[IndexedDB] Adding txn, value, and key size metrics

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 {
@@ skipping 206 matching lines @@
 }
 void IndexedDBFakeBackingStore::FakeTransaction::Begin() {}
 leveldb::Status IndexedDBFakeBackingStore::FakeTransaction::CommitPhaseOne(
     scoped_refptr<BlobWriteCallback> callback) {
   callback->Run(IndexedDBBackingStore::BlobWriteResult::SUCCESS_SYNC);
   return leveldb::Status::OK();
 }
 leveldb::Status IndexedDBFakeBackingStore::FakeTransaction::CommitPhaseTwo() {
   return result_;
 }
+uint64_t IndexedDBFakeBackingStore::FakeTransaction::GetTransactionSize() {
+  return 0;
+}
 void IndexedDBFakeBackingStore::FakeTransaction::Rollback() {}
 
 }  // namespace content