[Chromeshine] Update TODO comment to be informational only

Bug: 927655
Change-Id: I8b17e802e5c419f3d6179d690199d328f9792efa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2623028
Auto-Submit: Natalie Chouinard <chouinard@chromium.org>
Reviewed-by: Patrick Noland <pnoland@chromium.org>
Commit-Queue: Patrick Noland <pnoland@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842257}

chrome/browser/android/usage_stats/usage_stats_database.cc

@@ -219,9 +219,8 @@ void UsageStatsDatabase::DeleteEventsInRange(base::Time startTime,
     return;
   }
 
-  // TODO(crbug/927655): If/when leveldb_proto adds an UpdateEntriesInRange
-  // function, we should consolidate these two proto_db_ calls into a single
-  // call.
+  // If leveldb_proto adds a DeleteEntriesInRange function, these two proto_db_
+  // calls could be consolidated into a single call (crbug.com/939136).
 
   // Load all WebsiteEvents where the timestamp is in the specified range.
   // Function accepts a half-open range [startTime, endTime) as input, but the