Adds initial JNI bridge code for Background Scheduler implementation.

chrome/browser/android/offline_pages/background_scheduler_bridge.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_BACKGROUND_SCHEDULER_BRIDGE_H_
+#define CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_SCHEDULER_BRIDGE_H_
+
+#include "base/android/jni_android.h"
+#include "components/offline_pages/background/scheduler.h"
+
+namespace content {
+class BrowserContext;
+}
+
+namespace offline_pages {
+namespace android {
+
+/**
+ * Bridge between C++ and Java for implementing background scheduler
+ * on Android.
+ */
+class BackgroundSchedulerBridge : Scheduler {
+ public:
+  BackgroundSchedulerBridge();
+  ~BackgroundSchedulerBridge() override;
+
+  // Scheduler implementation.
+  void EnsureScheduled(const TriggerCondition& trigger_condition) override;
+  void ClearScheduled() override;
+};
+
+bool RegisterBackgroundSchedulerBridge(JNIEnv* env);
+
+}  // namespace android
+}  // namespace offline_pages
+
+#endif  // CHROME_BROWSER_ANDROID_OFFLINE_PAGES_BACKGROUND_SCHEDULER_BRIDGE_H_
+