Extract guts of ChromeStabilityMetricsProvider into helper class

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 41 matching lines @@
 const char kMetricsSessionID[] = "user_experience_metrics.session_id";
 
 // Number of times the browser has been able to register crash reporting.
 const char kStabilityBreakpadRegistrationSuccess[] =
     "user_experience_metrics.stability.breakpad_registration_ok";
 
 // Number of times the browser has failed to register crash reporting.
 const char kStabilityBreakpadRegistrationFail[] =
     "user_experience_metrics.stability.breakpad_registration_fail";
 
+// Total number of child process crashes (other than renderer / extension
+// renderer ones, and plugin children, which are counted separately) since the
+// last report.
+const char kStabilityChildProcessCrashCount[] =
+    "user_experience_metrics.stability.child_process_crash_count";
+
 // Number of times the application exited uncleanly since the last report.
 const char kStabilityCrashCount[] =
     "user_experience_metrics.stability.crash_count";
 
 // Number of times the browser has been run under a debugger.
 const char kStabilityDebuggerPresent[] =
     "user_experience_metrics.stability.debugger_present";
 
 // Number of times the browser has not been run under a debugger.
 const char kStabilityDebuggerNotPresent[] =
     "user_experience_metrics.stability.debugger_not_present";
 
 // An enum value to indicate the execution phase the browser was in.
 const char kStabilityExecutionPhase[] =
     "user_experience_metrics.stability.execution_phase";
 
 // True if the previous run of the program exited cleanly.
 const char kStabilityExitedCleanly[] =
     "user_experience_metrics.stability.exited_cleanly";
 
+// Number of times an extension renderer process crashed since the last report.
+const char kStabilityExtensionRendererCrashCount[] =
+    "user_experience_metrics.stability.extension_renderer_crash_count";
+
+// Number of times an extension renderer process failed to launch since the last
+// report.
+const char kStabilityExtensionRendererFailedLaunchCount[] =
+    "user_experience_metrics.stability.extension_renderer_failed_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[] =
+    "user_experience_metrics.stability.renderer_failed_launch_count";
+
+// Number of times the renderer has become non-responsive since the last
+// report.
+const char kStabilityRendererHangCount[] =
+    "user_experience_metrics.stability.renderer_hang_count";
+
 // Base64 encoded serialized UMA system profile proto from the previous session.
 const char kStabilitySavedSystemProfile[] =
     "user_experience_metrics.stability.saved_system_profile";
 
 // SHA-1 hash of the serialized UMA system profile proto (hex encoded).
 const char kStabilitySavedSystemProfileHash[] =
     "user_experience_metrics.stability.saved_system_profile_hash";
 
 // False if we received a session end and either we crashed during processing
 // the session end or ran out of time and windows terminated us.
 const char kStabilitySessionEndCompleted[] =
     "user_experience_metrics.stability.session_end_completed";
 
 // Build time, in seconds since an epoch, which is used to assure that stability
 // metrics reported reflect stability of the same build.
 const char kStabilityStatsBuildTime[] =
     "user_experience_metrics.stability.stats_buildtime";
 
 // Version string of previous run, which is used to assure that stability
 // metrics reported under current version reflect stability of the same version.
 const char kStabilityStatsVersion[] =
     "user_experience_metrics.stability.stats_version";
 
 // The keys below are strictly increasing counters over the lifetime of
 // a chrome installation. They are (optionally) sent up to the uninstall
 // survey in the event of uninstallation.
 const char kUninstallLaunchCount[] = "uninstall_metrics.launch_count";
+const char kUninstallMetricsPageLoadCount[] =
+    "uninstall_metrics.page_load_count";
 const char kUninstallMetricsUptimeSec[] = "uninstall_metrics.uptime_sec";
 
 }  // namespace prefs
 }  // namespace metrics