Cleanup dead code in base/ as found by Scythe.

base/event_recorder_stubs.cc

-// Copyright (c) 2009 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 "base/event_recorder.h"
-
-// This file implements a link stub for EventRecorder that can be used on
-// platforms that don't have a working EventRecorder implementation.
-
-namespace base {
-
-EventRecorder* EventRecorder::current_;  // Our singleton.
-
-bool EventRecorder::StartRecording(const FilePath& filename) {
-  return true;
-}
-
-void EventRecorder::StopRecording() {
-}
-
-bool EventRecorder::StartPlayback(const FilePath& filename) {
-  return false;
-}
-
-void EventRecorder::StopPlayback() {
-}
-
-}  // namespace