Cleanup old TODO comments, removing ones that are no longer relevant, and adding bug numbers to one…

components/offline_pages/core/background/cleanup_task.cc

Index: components/offline_pages/core/background/cleanup_task.cc
diff --git a/components/offline_pages/core/background/cleanup_task.cc b/components/offline_pages/core/background/cleanup_task.cc
index 84e2a7864d4c24f9c466899da980bcd411166657..d66d48b610e7094ee977206906a587441e534170 100644
--- a/components/offline_pages/core/background/cleanup_task.cc
+++ b/components/offline_pages/core/background/cleanup_task.cc
@@ -56,8 +56,8 @@ void CleanupTask::Prune(
     return;
   }
 
-  // TODO(petewil): Add UMA saying why we remove them
-  // TODO(petewil): Round trip the reason for deleting through the RQ
+  // TODO(petewil): Add UMA saying why we remove them.  Round trip the reason
+  // for deleting through the RQ callbacks.  crbug.com/705115.
   store_->RemoveRequests(expired_request_ids,
                          base::Bind(&CleanupTask::OnRequestsExpired,
                                     weak_ptr_factory_.GetWeakPtr()));