[Omaha] Make the whole pipeline run each time

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

Index: chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaDelegate.java
new file mode 100644
index 0000000000000000000000000000000000000000..95091743eb3d258b80b8b5415b10ed3713522891
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaDelegate.java
@@ -0,0 +1,80 @@
+// 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 org.chromium.chrome.browser.omaha.OmahaClient.PostResult;
+
+/** Delegates calls out from the OmahaClient. */
+public abstract class OmahaDelegate {
+    protected final Context mContext;
+    private RequestGenerator mRequestGenerator;
+
+    OmahaDelegate(Context context) {
+        mContext = context;
+    }
+
+    /** @return Context that is used to interact with the system. */
+    Context getContext() {
+        return mContext;
+    }
+
+    /** @return Whether Chrome is installed as part of the system image. */
+    abstract boolean isInSystemImage();
+
+    /** @return The scheduler used to trigger jobs. */
+    abstract ExponentialBackoffScheduler getScheduler();
+
+    /** @return The {@link RequestGenerator} used to create Omaha XML. */
+    final RequestGenerator getRequestGenerator() {
+        if (mRequestGenerator == null) mRequestGenerator = createRequestGenerator(getContext());
+        return mRequestGenerator;
+    }
+
+    /** @return A UUID that can be used to identify particular requests. */
+    abstract String generateUUID();
+
+    /** Determine whether or not Chrome is currently being used actively. */
+    abstract boolean isChromeBeingUsed();
+
+    /**
+     * Schedules the {@link Service} to run again at the given time.
+     * @param service         Service that is doing the scheduling.
+     * @param nextTimestampMs When the service should be run again.
+     */
+    abstract void scheduleService(Service service, long nextTimestampMs);
+
+    /** Creates a {@link RequestGenerator}. */
+    abstract RequestGenerator createRequestGenerator(Context context);
+
+    /**
+     * Called when {@link OmahaClient#registerNewRequest} finishes.
+     * @param timestampRequestMs When the next active user request should be generated.
+     * @param timestampPostMs    Earliest time the next POST should be allowed.
+     */
+    void onRegisterNewRequestDone(long timestampRequestMs, long timestampPostMs) {}
+
+    /**
+     * Called when {@link OmahaClient#handlePostRequest} finishes.
+     * @param result              See {@link PostResult}.
+     * @param installEventWasSent Whether or not an install event was sent.
+     */
+    void onHandlePostRequestDone(@PostResult int result, boolean installEventWasSent) {}
+
+    /**
+     * Called when {@link OmahaClient#generateAndPostRequest} finishes.
+     * @param succeeded Whether or not the post was successfully received by the server.
+     */
+    void onGenerateAndPostRequestDone(boolean succeeded) {}
+
+    /**
+     * Called when {@link OmahaClient#saveState} finishes.
+     * @param timestampRequestMs When the next active user request should be generated.
+     * @param timestampPostMs    Earliest time the next POST should be allowed.
+     */
+    void onSaveStateDone(long timestampRequestMs, long timestampPostMs) {}
+}