Deflake Simple Cache backend on Windows.

net/disk_cache/simple/simple_util.h

Index: net/disk_cache/simple/simple_util.h
diff --git a/net/disk_cache/simple/simple_util.h b/net/disk_cache/simple/simple_util.h
index b6ca85bb23be044c63296202e408ee183449e2de..feebfcc98d2ddde30e6fcf94654993cc25880712 100644
--- a/net/disk_cache/simple/simple_util.h
+++ b/net/disk_cache/simple/simple_util.h
@@ -69,7 +69,13 @@ NET_EXPORT_PRIVATE int GetFileIndexFromStreamIndex(int stream_index);
 // functions in file.h, the time resolution is milliseconds.
 NET_EXPORT_PRIVATE bool GetMTime(const base::FilePath& path,
                                  base::Time* out_mtime);
-}  // namespace simple_backend
+
+// Deletes a file, insuring POSIX semantics; it is possible to delete an open
+// file and continue to use that file. After deleting an open file, it is also
+// possible to immediately create a new file with the same name.

[mmenke, 2014/10/28 20:07:43]

Think it's worth mentioning this requires all open file handles be opened with
File::FLAG_SHARE_DELETE.

[gavinp, 2014/10/28 23:09:39]

Done.

+NET_EXPORT_PRIVATE bool SimpleCacheDeleteFile(const base::FilePath& path);
+
+}  // namespace simple_util
 
 }  // namespace disk_cache