[Omaha] Move most functionality to OmahaBase, add JobService

chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaDelegateImpl.java

-// Copyright 2017 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.
-
-package org.chromium.chrome.browser.omaha;
-
-import android.app.Service;
-import android.content.Context;
-import android.content.pm.ApplicationInfo;
-
-import org.chromium.base.ApiCompatibilityUtils;
-import org.chromium.base.ApplicationStatus;
-import org.chromium.chrome.browser.ChromeApplication;
-
-import java.util.UUID;
-
-/** Delegates calls out from the OmahaClient. */
-public class OmahaDelegateImpl extends OmahaDelegate {
-    private final ExponentialBackoffScheduler mScheduler;
-
-    OmahaDelegateImpl(Context context) {
-        super(context);
-        mScheduler = new ExponentialBackoffScheduler(OmahaBase.PREF_PACKAGE, context,
-                OmahaClient.MS_POST_BASE_DELAY, OmahaClient.MS_POST_MAX_DELAY);
-    }
-
-    @Override
-    boolean isInSystemImage() {
-        return (getContext().getApplicationInfo().flags & ApplicationInfo.FLAG_SYSTEM) != 0;
-    }
-
-    @Override
-    ExponentialBackoffScheduler getScheduler() {
-        return mScheduler;
-    }
-
-    @Override
-    String generateUUID() {
-        return UUID.randomUUID().toString();
-    }
-
-    @Override
-    boolean isChromeBeingUsed() {
-        boolean isChromeVisible = ApplicationStatus.hasVisibleActivities();
-        boolean isScreenOn = ApiCompatibilityUtils.isInteractive(getContext());
-        return isChromeVisible && isScreenOn;
-    }
-
-    @Override
-    void scheduleService(Service service, long nextTimestamp) {
-        if (service instanceof OmahaClient) {
-            getScheduler().createAlarm(OmahaClient.createOmahaIntent(getContext()), nextTimestamp);
-        } else {
-            // TODO(dfalcantara): Do something here with a JobService.
-        }
-    }
-
-    @Override
-    protected RequestGenerator createRequestGenerator(Context context) {
-        return ((ChromeApplication) context.getApplicationContext()).createOmahaRequestGenerator();
-    }
-}