Add TODO to BrowsingHistoryService regarding WebHistory deletion.

chrome/browser/history/browsing_history_service.cc

Index: chrome/browser/history/browsing_history_service.cc
diff --git a/chrome/browser/history/browsing_history_service.cc b/chrome/browser/history/browsing_history_service.cc
index 9f257c9f59d756e88ceb7793ae40c1775bcc943d..a02601a60e744214f4962fd282d500832cc79a29 100644
--- a/chrome/browser/history/browsing_history_service.cc
+++ b/chrome/browser/history/browsing_history_service.cc
@@ -575,6 +575,8 @@ void BrowsingHistoryService::OnURLsDeleted(
 }
 
 void BrowsingHistoryService::OnWebHistoryDeleted() {
+  // TODO(calamity): Only ignore web history deletions when they are actually
+  // initiated by us, rather than ignoring them whenever we are deleting.
   if (!has_pending_delete_request_)
     handler_->HistoryDeleted();
 }