[Android] Implements OS upgrade check and rescheduling

chrome/android/java/src/org/chromium/chrome/browser/DeferredStartupHandler.java

Index: chrome/android/java/src/org/chromium/chrome/browser/DeferredStartupHandler.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/DeferredStartupHandler.java b/chrome/android/java/src/org/chromium/chrome/browser/DeferredStartupHandler.java
index 0ec3406b75ce1c8850f42ad7894eb8019a422b14..4c0dea69283a82ba165702bd30069d5366929c80 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/DeferredStartupHandler.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/DeferredStartupHandler.java
@@ -45,6 +45,7 @@ import org.chromium.chrome.browser.share.ShareHelper;
 import org.chromium.chrome.browser.webapps.ChromeWebApkHost;
 import org.chromium.chrome.browser.webapps.WebApkVersionManager;
 import org.chromium.chrome.browser.webapps.WebappRegistry;
+import org.chromium.components.background_task_scheduler.BackgroundTaskSchedulerFactory;
 import org.chromium.components.minidump_uploader.CrashFileManager;
 import org.chromium.content.browser.ChildProcessLauncher;
 
@@ -251,6 +252,15 @@ public class DeferredStartupHandler {
             }
         });
 
+        mDeferredTasks.add(new Runnable() {
+            @Override
+            public void run() {
+                // Check of OS upgrade to reschedule background tasks.
+                BackgroundTaskSchedulerFactory.getScheduler().checkForOSUpgrade(
+                        ContextUtils.getApplicationContext());
+            }
+        });
+
         ProcessInitializationHandler.getInstance().initializeDeferredStartupTasks();
     }