Move app/sql/* files to sql/ directory.

app/sql/transaction.cc

-// Copyright (c) 2010 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 "app/sql/transaction.h"
-
-#include "app/sql/connection.h"
-#include "base/logging.h"
-
-namespace sql {
-
-Transaction::Transaction(Connection* connection)
-    : connection_(connection),
-      is_open_(false) {
-}
-
-Transaction::~Transaction() {
-  if (is_open_)
-    connection_->RollbackTransaction();
-}
-
-bool Transaction::Begin() {
-  if (is_open_) {
-    NOTREACHED() << "Beginning a transaction twice!";
-    return false;
-  }
-  is_open_ = connection_->BeginTransaction();
-  return is_open_;
-}
-
-void Transaction::Rollback() {
-  if (!is_open_) {
-    NOTREACHED() << "Attempting to roll back a nonexistent transaction. "
-                 << "Did you remember to call Begin() and check its return?";
-    return;
-  }
-  is_open_ = false;
-  connection_->RollbackTransaction();
-}
-
-bool Transaction::Commit() {
-  if (!is_open_) {
-    NOTREACHED() << "Attempting to commit a nonexistent transaction. "
-                 << "Did you remember to call Begin() and check its return?";
-    return false;
-  }
-  is_open_ = false;
-  return connection_->CommitTransaction();
-}
-
-}  // namespace sql