Add ScopedKeepAlive to c/b/lifetime

chrome/browser/lifetime/keep_alive_types.cc

Index: chrome/browser/lifetime/keep_alive_types.cc
diff --git a/chrome/browser/lifetime/keep_alive_types.cc b/chrome/browser/lifetime/keep_alive_types.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0cd4fcea9b98d302e12378a82fb501cda705322a
--- /dev/null
+++ b/chrome/browser/lifetime/keep_alive_types.cc
@@ -0,0 +1,30 @@
+// Copyright 2016 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 "chrome/browser/lifetime/keep_alive_types.h"
+#include "base/logging.h"
+
+#ifndef NDEBUG
+std::ostream& operator<<(std::ostream& out, const KeepAliveOrigin& origin) {
+  switch (origin) {
+    case KeepAliveOrigin::BACKGROUND_MODE_MANAGER:
+      return out << "BACKGROUND_MODE_MANAGER";
+    case KeepAliveOrigin::APP_LIST_SERVICE_VIEWS:
+      return out << "APP_LIST_SERVICE_VIEWS";
+    case KeepAliveOrigin::APP_LIST_SHOWER:
+      return out << "APP_LIST_SHOWER";
+    case KeepAliveOrigin::CHROME_APP_DELEGATE:
+      return out << "CHROME_APP_DELEGATE";
+    case KeepAliveOrigin::PANEL_VIEW:
+      return out << "PANEL_VIEW";
+    case KeepAliveOrigin::PROFILE_LOADER:
+      return out << "PROFILE_LOADER";
+    case KeepAliveOrigin::USER_MANAGER_VIEW:
+      return out << "USER_MANAGER_VIEW";
+  }
+
+  NOTREACHED();
+  return out << static_cast<int>(origin);
+}
+#endif  // ndef DEBUG