Gather stability prefs into managing objects.

components/metrics/metrics_pref_names.cc

 // Copyright 2014 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 "components/metrics/metrics_pref_names.h"
 
 namespace metrics {
 namespace prefs {
 
 // Set once, to the current epoch time, on the first run of chrome on this
@@ skipping 110 matching lines @@
 
 // Number of times an extension renderer process successfully launched since the
 // last report.
 const char kStabilityExtensionRendererLaunchCount[] =
     "user_experience_metrics.stability.extension_renderer_launch_count";
 
 // Number of times the session end did not complete.
 const char kStabilityIncompleteSessionEndCount[] =
     "user_experience_metrics.stability.incomplete_session_end_count";
 
-// Time when the app was last known to be running, in seconds since
-// the epoch.
-const char kStabilityLastTimestampSec[] =
-    "user_experience_metrics.stability.last_timestamp_sec";
-
 // Number of times the application was launched since last report.
 const char kStabilityLaunchCount[] =
     "user_experience_metrics.stability.launch_count";
 
-// Time when the app was last launched, in seconds since the epoch.
-const char kStabilityLaunchTimeSec[] =
-    "user_experience_metrics.stability.launch_time_sec";
-
 // Number of times a page load event occurred since the last report.
 const char kStabilityPageLoadCount[] =
     "user_experience_metrics.stability.page_load_count";
 
 // Number of times a renderer process crashed since the last report.
 const char kStabilityRendererCrashCount[] =
     "user_experience_metrics.stability.renderer_crash_count";
 
 // Number of times a renderer process failed to launch since the last report.
 const char kStabilityRendererFailedLaunchCount[] =
@@ skipping 48 matching lines @@
 // Dictionary for measuring cellular data used by UMA service during last 7
 // days.
 const char kUmaCellDataUse[] = "user_experience_metrics.uma_cell_datause";
 
 // Dictionary for measuring cellular data used by user including chrome services
 // per day.
 const char kUserCellDataUse[] = "user_experience_metrics.user_call_datause";
 
 }  // namespace prefs
 }  // namespace metrics