Convert to RepeatingCallback in download item

I tried to convert it to OnceCallback, but had problem with circular_deque https://logs.chromium.org/logs/chromium/buildbucket/cr-buildbucket.appspot.com/8875545102440823552/+/steps/compile__with_patch_/0/logs/raw_io.output_failure_summary_/0

I guess we should go with RepeatingCallback here

Bug: 1007685
Change-Id: I16a77c2f9a19f982249220adad1a9fb2dbbf7507
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2282143Reviewed-by: Shakti Sahu <shaktisahu@chromium.org>
Commit-Queue: Quang Minh Tuan Nguyen <nqmtuan@google.com>
Cr-Commit-Position: refs/heads/master@{#785305}

components/download/internal/common/download_item_impl_unittest.cc

@@ -2259,7 +2259,7 @@ TEST_F(DownloadItemTest, AnnotationWithEmptyURLInIncognito) {
 // various permutations of observer calls that will then be applied to a
 // DownloadItem in a state as yet undetermined.
 using CurriedObservation =
-    base::Callback<void(base::WeakPtr<DownloadDestinationObserver>)>;
+    base::RepeatingCallback<void(base::WeakPtr<DownloadDestinationObserver>)>;
 
 // A list of observations that are to be made during some event in the
 // DownloadItemImpl control flow. Ordering of the observations is significant.
@@ -2369,17 +2369,17 @@ std::vector<EventList> DistributeObservationsIntoEvents(
 
 std::vector<EventList> GenerateSuccessfulEventLists() {
   std::vector<CurriedObservation> all_observations;
-  all_observations.push_back(base::Bind(&DestinationUpdateInvoker, 100, 100));
-  all_observations.push_back(base::Bind(&DestinationUpdateInvoker, 200, 100));
-  all_observations.push_back(base::Bind(&DestinationCompletedInvoker, 200));
+  all_observations.push_back(base::BindRepeating(&DestinationUpdateInvoker, 100, 100));
+  all_observations.push_back(base::BindRepeating(&DestinationUpdateInvoker, 200, 100));
+  all_observations.push_back(base::BindRepeating(&DestinationCompletedInvoker, 200));
   return DistributeObservationsIntoEvents(all_observations.begin(),
                                           all_observations.end(), kEventCount);
 }
 
 std::vector<EventList> GenerateFailingEventLists() {
   std::vector<CurriedObservation> all_observations;
-  all_observations.push_back(base::Bind(&DestinationUpdateInvoker, 100, 100));
-  all_observations.push_back(base::Bind(
+  all_observations.push_back(base::BindRepeating(&DestinationUpdateInvoker, 100, 100));
+  all_observations.push_back(base::BindRepeating(
       &DestinationErrorInvoker, DOWNLOAD_INTERRUPT_REASON_NETWORK_FAILED, 100));
   return DistributeObservationsIntoEvents(all_observations.begin(),
                                           all_observations.end(), kEventCount);