Remove the unmaintained performance monitor.

chrome/browser/performance_monitor/constants.h

Index: chrome/browser/performance_monitor/constants.h
diff --git a/chrome/browser/performance_monitor/constants.h b/chrome/browser/performance_monitor/constants.h
index 84dfb8ea775f3463e3dae46e0127e50dd6e34733..f9eee3fb9c2625cf1b05922d797534029f107394 100644
--- a/chrome/browser/performance_monitor/constants.h
+++ b/chrome/browser/performance_monitor/constants.h
@@ -5,43 +5,11 @@
 #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;
+// collections.
+const int kGatherIntervalInSeconds = 120;
 
 // Performance alert thresholds