[Offline pages] Updates to background scheduling to use BTS

chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
index cf09c6a84d6fb23448d24a8ad44394174a95936f..d18f73df3be01fae2728893ab451a270538af04a 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/offlinepages/BackgroundSchedulerBridge.java
@@ -9,6 +9,8 @@ import org.chromium.base.ContextUtils;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 
+import java.util.concurrent.TimeUnit;
+
 /**
  * Provides Java scheduling support from native offlining code as
  * well as JNI interface to tell native code to start processing
@@ -42,19 +44,18 @@ public class BackgroundSchedulerBridge {
 
     @CalledByNative
     private static void schedule(TriggerConditions triggerConditions) {
-        BackgroundScheduler.getInstance(ContextUtils.getApplicationContext())
-                .schedule(triggerConditions);
+        BackgroundScheduler.getInstance().schedule(triggerConditions);
     }
 
     @CalledByNative
     private static void backupSchedule(TriggerConditions triggerConditions, long delayInSeconds) {
-        BackgroundScheduler.getInstance(ContextUtils.getApplicationContext())
-                .scheduleBackup(triggerConditions, delayInSeconds);
+        BackgroundScheduler.getInstance().scheduleBackup(
+                triggerConditions, TimeUnit.SECONDS.toMillis(delayInSeconds));
     }
 
     @CalledByNative
     private static void unschedule() {
-        BackgroundScheduler.getInstance(ContextUtils.getApplicationContext()).cancel();
+        BackgroundScheduler.getInstance().cancel();
     }
 
     @CalledByNative