Chromecast: adds stability metrics provider to track crashes.

chromecast/common/pref_names.cc

Index: chromecast/common/pref_names.cc
diff --git a/chromecast/common/pref_names.cc b/chromecast/common/pref_names.cc
index 0fed7c8e8b606d1ddbdf7fa660a91be8b364cb13..34d5731605c0ac232f7720f5f4cc0772c2ce1305 100644
--- a/chromecast/common/pref_names.cc
+++ b/chromecast/common/pref_names.cc
@@ -10,4 +10,19 @@ namespace prefs {
 // that remote debugging is disabled.
 const char kRemoteDebuggingPort[] = "remote_debugging_port";
 
+// 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 a renderer process crashed since the last report.
+const char kStabilityRendererCrashCount[] =
+    "user_experience_metrics.stability.renderer_crash_count";
+
+// Number of times the renderer has become non-responsive since the last
+// report.
+const char kStabilityRendererHangCount[] =
+    "user_experience_metrics.stability.renderer_hang_count";
+
 }  // namespace prefs