[Offline Pages] Add basic evaluation tests and related changes.

chrome/browser/android/offline_pages/evaluation/evaluation_test_scheduler.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 CHROME_BROWSER_ANDROID_OFFLINE_PAGES_EVALUATION_EVALUATION_TEST_SCHEDULER_H_
+#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_EVALUATION_EVALUATION_TEST_SCHEDULER_H_
+
+#include "components/offline_pages/background/scheduler.h"
+
+namespace offline_pages {
+namespace android {
+
+class EvaluationTestScheduler : public Scheduler {
+ public:
+  // Scheduler implementation.
+  void Schedule(const TriggerConditions& trigger_conditions) override;
+  void BackupSchedule(const TriggerConditions& trigger_conditions,
+                      long delay_in_seconds) override;
+  void Unschedule() override;
+
+  // Callback used by user request.
+  void ImmediateScheduleCallback(bool result);
+};
+
+}  // namespace android
+}  // namespace offline_pages
+
+#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_EVALUATION_EVALUATION_TEST_SCHEDULER_H_