Convert simple_index to RepeatingClosure

Bug: 1007815
Change-Id: Ie29c204ced96f1975cb5f2c287dfb8a3a6a36325
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2089875Reviewed-by: Maksim Orlovich <morlovich@chromium.org>
Commit-Queue: Anna Malova <amalova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#747436}

net/disk_cache/simple/simple_index.cc

@@ -185,9 +185,9 @@ SimpleIndex::SimpleIndex(
       task_runner_(task_runner),
       // Creating the callback once so it is reused every time
       // write_to_disk_timer_.Start() is called.
-      write_to_disk_cb_(base::Bind(&SimpleIndex::WriteToDisk,
-                                   AsWeakPtr(),
-                                   INDEX_WRITE_REASON_IDLE)) {}
+      write_to_disk_cb_(base::BindRepeating(&SimpleIndex::WriteToDisk,
+                                            AsWeakPtr(),
+                                            INDEX_WRITE_REASON_IDLE)) {}
 
 SimpleIndex::~SimpleIndex() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);

net/disk_cache/simple/simple_index.h

@@ -300,7 +300,7 @@ class NET_EXPORT_PRIVATE SimpleIndex
   base::TimeTicks last_write_to_disk_;
 
   base::OneShotTimer write_to_disk_timer_;
-  base::Closure write_to_disk_cb_;
+  base::RepeatingClosure write_to_disk_cb_;
 
   typedef std::list<net::CompletionOnceCallback> CallbackList;
   CallbackList to_run_when_initialized_;