Remove the unmaintained performance monitor.

chrome/browser/performance_monitor/event.cc

-// Copyright (c) 2012 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 "chrome/browser/performance_monitor/event.h"
-
-#include "base/logging.h"
-
-namespace performance_monitor {
-
-Event::Event(const EventType& type,
-             const base::Time& time,
-             scoped_ptr<base::DictionaryValue> data)
-    : type_(type), time_(time), data_(data.release()) {
-}
-
-Event::~Event() {
-}
-
-scoped_ptr<Event> Event::FromValue(scoped_ptr<base::DictionaryValue> data) {
-  int type = 0;
-  if (!data->GetInteger(std::string("eventType"), &type))
-    return scoped_ptr<Event>();
-  double time = 0.0;
-  if (!data->GetDouble(std::string("time"), &time))
-    return scoped_ptr<Event>();
-  return scoped_ptr<Event>(new Event(static_cast<EventType>(type),
-                                     base::Time::FromInternalValue((int64)time),
-                                     data.Pass()));
-}
-
-}  // namespace performance_monitor