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

content/browser/indexed_db/indexed_db_backing_store.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_backing_store.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/files/file_path.h"
@@ skipping 4346 matching lines @@
   if (chained_blob_writer_.get()) {
     chained_blob_writer_->Abort();
     chained_blob_writer_ = NULL;
   }
   if (!transaction_)
     return;
   transaction_->Rollback();
   transaction_ = NULL;
 }
 
+uint64_t IndexedDBBackingStore::Transaction::GetTransactionSize() {
+  DCHECK(transaction_);
+  return transaction_->GetTransactionSize();
+}
+
 IndexedDBBackingStore::BlobChangeRecord::BlobChangeRecord(
     const std::string& key,
     int64_t object_store_id)
     : key_(key), object_store_id_(object_store_id) {}
 
 IndexedDBBackingStore::BlobChangeRecord::~BlobChangeRecord() {
 }
 
 void IndexedDBBackingStore::BlobChangeRecord::SetBlobInfo(
     std::vector<IndexedDBBlobInfo>* blob_info) {
@@ skipping 110 matching lines @@
 
 IndexedDBBackingStore::Transaction::WriteDescriptor::WriteDescriptor(
     const WriteDescriptor& other) = default;
 IndexedDBBackingStore::Transaction::WriteDescriptor::~WriteDescriptor() =
     default;
 IndexedDBBackingStore::Transaction::WriteDescriptor&
     IndexedDBBackingStore::Transaction::WriteDescriptor::
     operator=(const WriteDescriptor& other) = default;
 
 }  // namespace content