Performance monitor stats gathering.

chrome/browser/performance_monitor/constants.cc

 // 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.
 
 #include "chrome/browser/performance_monitor/constants.h"
 
 namespace performance_monitor {
 
+const char kMetricCPUUsage[] = "cpu_usage";
+const char kMetricCPUUsageDescription[] =
+    "Total CPU usage of all running Chrome processes.";
+const char kMetricPrivateMemoryUsage[] = "private_memory_usage";
+const char kMetricPrivateMemoryUsageDescription[] =
+    "Total private memory usage of all running Chrome processes.";
+const char kMetricSharedMemoryUsage[] = "shared_memory_usage";
+const char kMetricSharedMemoryUsageDescription[] =
+    "Total shared memory usage of all running Chrome processes.";
 // The key to insert/retrieve information about the chrome version from the
 // database.
 const char kStateChromeVersion[] = "chrome_version";
 const char kMetricNotFoundError[] = "Mertic details not found.";
 const char kProcessChromeAggregate[] = "chrome_aggregate";
-const char kSampleMetricDescription[] = "A sample metric.";
-const char kSampleMetricName[] = "SAMPLE";
 
 }  // namespace performance_monitor