Remove the unmaintained performance monitor.

chrome/browser/performance_monitor/metric.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_METRIC_H_
-#define CHROME_BROWSER_PERFORMANCE_MONITOR_METRIC_H_
-
-#include <string>
-#include "base/time/time.h"
-
-namespace performance_monitor {
-
-// IMPORTANT: To add new metrics, please
-// - Place the new metric above METRIC_NUMBER_OF_METRICS.
-// - Add a member to the MetricKeyChar enum in key_builder.cc.
-// - Add the appropriate messages in generated_resources.grd.
-// - Add the appropriate functions in
-//   chrome/browser/ui/webui/performance_monitor/performance_monitor_l10n.h.
-enum MetricType {
-  METRIC_UNDEFINED,
-
-  // CPU and memory usage are combined for all Chrome-related processes.
-  METRIC_CPU_USAGE,
-  METRIC_PRIVATE_MEMORY_USAGE,
-  METRIC_SHARED_MEMORY_USAGE,
-
-  // Timing measurements; these are all independent metrics (e.g., session
-  // restore time is independent of startup time, even though they may happen
-  // in sequence). Test startup time refers to any non-normal startup time, e.g.
-  // when we run test suites.
-  METRIC_STARTUP_TIME,
-  METRIC_TEST_STARTUP_TIME,
-  METRIC_SESSION_RESTORE_TIME,
-  METRIC_PAGE_LOAD_TIME,
-
-  // Total number of bytes read since PerformanceMonitor first started running.
-  METRIC_NETWORK_BYTES_READ,
-
-  METRIC_NUMBER_OF_METRICS
-};
-
-struct Metric {
- public:
-  Metric();
-  Metric(MetricType metric_type,
-         const base::Time& metric_time,
-         const double metric_value);
-  Metric(MetricType metric_type,
-         const std::string& metric_time,
-         const std::string& metric_value);
-  ~Metric();
-
-  // Check the value in the metric to make sure that it is reasonable. Since
-  // some metric-gathering methods will fail and return incorrect values, we
-  // need to try to weed these out as best we can.
-  bool IsValid() const;
-
-  // This converts the double stored in value to a string format. This will
-  // not perform any checking on the validity of the metric, and only makes
-  // sense if the metric IsValid().
-  std::string ValueAsString() const;
-
-  MetricType type;
-  base::Time time;
-  double value;
-};
-
-}  // namespace performance_monitor
-
-#endif  // CHROME_BROWSER_PERFORMANCE_MONITOR_METRIC_H_