Remove the unmaintained performance monitor.

chrome/browser/performance_monitor/constants.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_CONSTANTS_H_
-#define CHROME_BROWSER_PERFORMANCE_MONITOR_CONSTANTS_H_
-
-#include "base/basictypes.h"
-#include "base/time/time.h"
-
-namespace performance_monitor {
-
-// Constants which are used by the PerformanceMonitor and its related classes.
-// The constants should be documented alongside the definition of their values
-// in the .cc file.
-
-extern const char kMetricNotFoundError[];
-extern const char kProcessChromeAggregate[];
-
-// State tokens
-extern const char kStateChromeVersion[];
-extern const char kStateProfilePrefix[];
-
-// The interval the watched processes are sampled for performance metrics.
-const int kSampleIntervalInSeconds = 10;
-// The default interval at which PerformanceMonitor performs its timed
-// collections; this can be overridden by using the kPerformanceMonitorGathering
-// switch with an associated (positive integer) value.
-const int kDefaultGatherIntervalInSeconds = 120;
-
-// Unit values (for use in metric, and on the UI side).
-
-// Memory measurements
-const int64 kBytesPerKilobyte = 1 << 10;
-const int64 kBytesPerMegabyte = kBytesPerKilobyte * (1 << 10);
-const int64 kBytesPerGigabyte = kBytesPerMegabyte * (1 << 10);
-const int64 kBytesPerTerabyte = kBytesPerGigabyte * (1 << 10);
-
-// Time measurements - Most of these are imported from base/time/time.h
-// These units are used for display (and it's related calculations), not for
-// any mathematical analysis. Thus we can estimate for values without an exact
-// conversion.
-const int64 kMicrosecondsPerMonth = base::Time::kMicrosecondsPerDay * 30;
-const int64 kMicrosecondsPerYear = base::Time::kMicrosecondsPerDay * 365;
-
-// Performance alert thresholds
-
-// If a process is consistently above this CPU utilization percentage over time,
-// we consider it as high and may take action.
-const float kHighCPUUtilizationThreshold = 90.0f;
-}  // namespace performance_monitor
-
-#endif  // CHROME_BROWSER_PERFORMANCE_MONITOR_CONSTANTS_H_