[Background Sync] Fix bug in BackgroundSyncScheduler.

BackgroundSyncScheduler code was returning an incorrect
delayed_processing_info for Periodic Background Sync.

This change fixes that.

Change-Id: Ic5aa4505de2613bea5cd676de8faeca76100eb8e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1851424
Auto-Submit: Mugdha Lakhani <nator@chromium.org>
Commit-Queue: Rayan Kanso <rayankans@chromium.org>
Reviewed-by: Rayan Kanso <rayankans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704564}

content/browser/background_sync/background_sync_scheduler.cc

@@ -91,7 +91,7 @@ DelayedProcessingInfo& BackgroundSyncScheduler::GetDelayedProcessingInfo(
   if (sync_type == blink::mojom::BackgroundSyncType::ONE_SHOT)
     return delayed_processing_info_one_shot_;
   else
-    return delayed_processing_info_one_shot_;
+    return delayed_processing_info_periodic_;
 }
 
 }  // namespace content

content/browser/background_sync/background_sync_scheduler_unittest.cc

@@ -171,4 +171,16 @@ TEST_F(BackgroundSyncSchedulerTest, MultipleStoragePartitions) {
   run_loop_2.Run();
 }
 
+TEST_F(BackgroundSyncSchedulerTest, ScheduleBothTypesOfSync) {
+  base::RunLoop run_loop_1, run_loop_2;
+  ScheduleDelayedProcessing(
+      GURL(kUrl_1), blink::mojom::BackgroundSyncType::ONE_SHOT,
+      base::TimeDelta::FromMilliseconds(1), run_loop_1.QuitClosure());
+  ScheduleDelayedProcessing(
+      GURL(kUrl_1), blink::mojom::BackgroundSyncType::PERIODIC,
+      base::TimeDelta::FromMilliseconds(1), run_loop_2.QuitClosure());
+  run_loop_1.Run();
+  run_loop_2.Run();
+}
+
 }  // namespace content