Try to speed up SimpleCache index re-sync on Windows.

net/disk_cache/simple/simple_index_file.h

Index: net/disk_cache/simple/simple_index_file.h
diff --git a/net/disk_cache/simple/simple_index_file.h b/net/disk_cache/simple/simple_index_file.h
index 981a03dd7d1b401bdf8e1eed89ae5b91eeeb59eb..8dce4bf78ba973ac49813cfd1a23ff7c961a3d85 100644
--- a/net/disk_cache/simple/simple_index_file.h
+++ b/net/disk_cache/simple/simple_index_file.h
@@ -105,7 +105,11 @@ class NET_EXPORT_PRIVATE SimpleIndexFile {
   friend class WrappedSimpleIndexFile;
 
   // Used for cache directory traversal.
-  typedef base::Callback<void (const base::FilePath&)> EntryFileCallback;
+  typedef base::Callback<void(const base::FilePath&,

[jkarlin, 2017/03/27 14:09:15]

While we're here, change this to using EntryFileCallback = ...;

[Maks Orlovich, 2017/03/27 15:25:44]

Done.

+                              base::Time last_accessed,
+                              base::Time last_modified,
+                              int64_t size)>
+      EntryFileCallback;
 
   // When loading the entries from disk, add this many extra hash buckets to
   // prevent reallocation on the IO thread when merging in new live entries.