Gather stability prefs into managing objects.

components/metrics/stability_pref_names.h

Index: components/metrics/stability_pref_names.h
diff --git a/components/metrics/stability_pref_names.h b/components/metrics/stability_pref_names.h
new file mode 100644
index 0000000000000000000000000000000000000000..faf2cdeafd2348d6929a7bfa1a1eb4d1233262c5
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+++ b/components/metrics/stability_pref_names.h
@@ -0,0 +1,42 @@
+// 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_METRICS_STABILITY_PREF_NAMES_H_
+#define COMPONENTS_METRICS_STABILITY_PREF_NAMES_H_
+
+namespace metrics {
+namespace prefs {
+
+// Preferences for recording stability logs.
+extern const char kStabilityBreakpadRegistrationSuccess[];
+extern const char kStabilityBreakpadRegistrationFail[];
+extern const char kStabilityChildProcessCrashCount[];
+extern const char kStabilityCrashCount[];
+extern const char kStabilityDebuggerPresent[];
+extern const char kStabilityDebuggerNotPresent[];
+extern const char kStabilityDeferredCount[];
+extern const char kStabilityDiscardCount[];
+extern const char kStabilityExecutionPhase[];
+extern const char kStabilityExtensionRendererCrashCount[];
+extern const char kStabilityExtensionRendererFailedLaunchCount[];
+extern const char kStabilityExtensionRendererLaunchCount[];
+extern const char kStabilityExitedCleanly[];
+extern const char kStabilityIncompleteSessionEndCount[];
+extern const char kStabilityLaunchCount[];
+extern const char kStabilityPageLoadCount[];
+extern const char kStabilityRendererCrashCount[];
+extern const char kStabilityRendererFailedLaunchCount[];
+extern const char kStabilityRendererHangCount[];
+extern const char kStabilityRendererLaunchCount[];
+extern const char kStabilitySavedSystemProfile[];
+extern const char kStabilitySavedSystemProfileHash[];
+extern const char kStabilitySessionEndCompleted[];
+extern const char kStabilityStatsBuildTime[];
+extern const char kStabilityStatsVersion[];
+extern const char kStabilityVersionMismatchCount[];
+
+}  // namespace prefs
+}  // namespace metrics
+
+#endif  // COMPONENTS_METRICS_STABILITY_PREF_NAMES_H_