Remove the unmaintained performance monitor.

chrome/browser/performance_monitor/event.h

-// 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.
-
-#ifndef CHROME_BROWSER_PERFORMANCE_MONITOR_EVENT_H_
-#define CHROME_BROWSER_PERFORMANCE_MONITOR_EVENT_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "base/time/time.h"
-#include "base/values.h"
-
-#include "chrome/browser/performance_monitor/event_type.h"
-
-namespace performance_monitor {
-
-const char* EventTypeToString(EventType event_type);
-
-// The wrapper class for the JSON-generated event classes for the performance
-// monitor. This class is used so we can pass around events in a single class,
-// rather than having a variety of different types (since JSON does not
-// currently support inheritance). Since the class will occasionally need to
-// be compared against other events, we construct it with type and time. Other
-// information should not be needed commonly, and is stored in a JSON-generated
-// DictionaryValue.
-class Event {
- public:
-  Event(const EventType& type,
-        const base::Time& time,
-        scoped_ptr<base::DictionaryValue> data);
-  virtual ~Event();
-
-  // Construct an event from the given DictionaryValue; takes ownership of
-  // |data|.
-  static scoped_ptr<Event> FromValue(scoped_ptr<base::DictionaryValue> data);
-
-  // Accessors
-  EventType type() const { return type_; }
-  base::Time time() const { return time_; }
-  base::DictionaryValue* data() const { return data_.get(); }
-
- private:
-
-  // The type of the event.
-  EventType type_;
-  // The time at which the event was recorded.
-  base::Time time_;
-  // The full JSON-generated value representing the information of the event;
-  // these data are described in chrome/browser/performance_monitor/events.json.
-  scoped_ptr<base::DictionaryValue> data_;
-};
-
-}  // namespace performance_monitor
-
-#endif  // CHROME_BROWSER_PERFORMANCE_MONITOR_EVENT_H_