Stability instrumentation: metrics for collection on crash

components/browser_watcher/stability_metrics.h

+// Copyright 2017 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.
+
+#ifndef COMPONENTS_BROWSER_WATCHER_STABILITY_METRICS_H_
+#define COMPONENTS_BROWSER_WATCHER_STABILITY_METRICS_H_
+
+namespace browser_watcher {
+
+// DO NOT REMOVE OR REORDER VALUES. This is logged persistently in a histogram.
+enum class CollectOnCrashEvent {
+  kCollectAttempt,
+  kUserDataDirNotEmpty,
+  kPathExists,
+  kReportExtractionSuccess,
+  kPmaSetDeletedFailed,
+  kOpenForDeleteFailed,
+  kSuccess,
+  // New values go here.
+  kCollectOnCrashEventMax
+};
+
+// DO NOT REMOVE OR REORDER VALUES. This is logged persistently in a histogram.
+enum class StabilityRecordEvent {
+  kRecordAttempt,
+  kStabilityDirectoryExists,
+  kGotStabilityPath,
+  kGotTracker,
+  kMarkDeleted,
+  kMarkDeletedGotFile,
+  kOpenForDeleteFailed,
+  // New values go here.
+  kStabilityRecordEventMax
+};
+
+void LogCollectOnCrashEvent(CollectOnCrashEvent event);
+void LogStabilityRecordEvent(StabilityRecordEvent event);
+
+}  // namespace browser_watcher
+
+#endif  // COMPONENTS_BROWSER_WATCHER_STABILITY_METRICS_H_