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

extensions/browser/api/alarms/alarms_api_constants.h

Index: extensions/browser/api/alarms/alarms_api_constants.h
diff --git a/extensions/browser/api/alarms/alarms_api_constants.h b/extensions/browser/api/alarms/alarms_api_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..e50022ccd51631e38859e9dca2e2e7224c8525f5
--- /dev/null
+++ b/extensions/browser/api/alarms/alarms_api_constants.h
@@ -0,0 +1,20 @@
+// 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.
+
+#ifndef EXTENSIONS_BROWSER_API_ALARMS_ALARMS_API_CONSTANTS_H_
+#define EXTENSIONS_BROWSER_API_ALARMS_ALARMS_API_CONSTANTS_H_
+
+namespace extensions {
+namespace alarms_api_constants {
+
+// Minimum specifiable alarm period (in minutes) for unpacked extensions.
+extern const double kDevDelayMinimum;
+
+// Minimum specifiable alarm period (in minutes) for packed/crx extensions.
+extern const int kReleaseDelayMinimum;
+
+}  // namespace alarms_api_constants
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_API_ALARMS_ALARMS_API_CONSTANTS_H_