Revert 157168 - Add guards to metric values; erase bad events/metrics from db

chrome/browser/performance_monitor/constants.cc

Index: chrome/browser/performance_monitor/constants.cc
===================================================================
--- chrome/browser/performance_monitor/constants.cc	(revision 157181)
+++ chrome/browser/performance_monitor/constants.cc	(working copy)
@@ -4,10 +4,10 @@
 
 #include "chrome/browser/performance_monitor/constants.h"
 
-#include "base/time.h"
-
 namespace performance_monitor {
 
+// TODO(chebert): i18n on all constants.
+
 // The error message displayed when a metric's details are not found.
 const char kMetricNotFoundError[] = "Metric details not found.";
 
@@ -28,16 +28,4 @@
 // collisions in the database.
 const char kStateProfilePrefix[] = "profile";
 
-// Unit values
-// 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
-const int64 kMicrosecondsPerMonth = base::Time::kMicrosecondsPerDay * 30;
-const int64 kMicrosecondsPerYear = base::Time::kMicrosecondsPerDay * 365;
-
-
 }  // namespace performance_monitor