Issue 501916 : Add data type counts to profile deletion flow

components/history/core/browser/history_service.h

Index: components/history/core/browser/history_service.h
diff --git a/components/history/core/browser/history_service.h b/components/history/core/browser/history_service.h
index fb12f816012d3865b1ae54cb3846bf1293ee0933..2fd62ab4fad51faaf733a6ac0754bd2ca24ff50a 100644
--- a/components/history/core/browser/history_service.h
+++ b/components/history/core/browser/history_service.h
@@ -331,6 +331,17 @@ class HistoryService : public syncer::SyncableService, public KeyedService {
       const QueryFilteredURLsCallback& callback,
       base::CancelableTaskTracker* tracker);
 
+  // Statistics ----------------------------------------------------------------
+
+  // Returns the count of URLs in the url database. The argument is the count.
+  // The count is zero if query to the database failed.
+  typedef base::Callback<void(int)> CountURLsCallback;
+
+  // Returns the count of URLs in the url database.
+  base::CancelableTaskTracker::TaskId HistoryService::CountURLs(

[lwchkg, 2015/07/29 14:46:05]

The extra "HistoryService::" is causing errors in trybot.

Too bad this is NOT caught in VS2013.

+      const CountURLsCallback& callback,
+      base::CancelableTaskTracker* tracker);
+
   // Database management operations --------------------------------------------
 
   // Delete all the information related to a single url.