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..a65a953aadd2df14911cc0215a41d1dcaab5de3f
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+++ b/extensions/browser/api/alarms/alarms_api_constants.h
@@ -0,0 +1,25 @@
+// 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;
+
+extern const char kWarningMinimumDevDelay[];
+extern const char kWarningMinimumReleaseDelay[];
+extern const char kWarningMinimumDevPeriod[];
+extern const char kWarningMinimumReleasePeriod[];
+
+}  // namespace alarms_api_constants
+}  // namespace extensions
+
+#endif  // EXTENSIONS_BROWSER_API_ALARMS_ALARMS_API_CONSTANTS_H_