Perform alarm's period limit check while reading alarm info from StateStore.

extensions/browser/api/alarms/alarms_api_constants.cc

Index: extensions/browser/api/alarms/alarms_api_constants.cc
diff --git a/extensions/browser/api/alarms/alarms_api_constants.cc b/extensions/browser/api/alarms/alarms_api_constants.cc
new file mode 100644
index 0000000000000000000000000000000000000000..34782ffc8b9c2b3ab074288dc5694b76eb03202b
--- /dev/null
+++ b/extensions/browser/api/alarms/alarms_api_constants.cc
@@ -0,0 +1,14 @@
+// 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 "extensions/browser/api/alarms/alarms_api_constants.h"
+
+namespace extensions {
+namespace alarms_api_constants {
+
+// 0.016667 minutes  ~= 1s.
+const double kDevDelayMinimum = 0.016667;
+
+}  // namespace alarms_api_constants
+}  // namespace extensions