Split the RequestPicker task into two separate tasks.

components/offline_pages/background/offliner_policy_utils.h

+// 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 COMPONENTS_OFFLINE_PAGES_BACKGROUND_OFFLINER_POLICY_UTILS_H_
+#define COMPONENTS_OFFLINE_PAGES_BACKGROUND_OFFLINER_POLICY_UTILS_H_
+
+namespace offline_pages {
+
+class OfflinerPolicy;
+class SavePageRequest;
+
+class OfflinerPolicyUtils {
+ public:
+  enum class RequestExpirationStatus {
+    VALID,
+    EXPIRED,
+    START_COUNT_EXCEEDED,
+    COMPLETION_COUNT_EXCEEDED,
+  };
+
+  static RequestExpirationStatus CheckRequestExpirationStatus(
+      const SavePageRequest* request,
+      const OfflinerPolicy* policy);
+};
+
+}  // namespace offline_pages
+
+#endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_OFFLINER_POLICY_UTILS_H_