Revert "Updating the mapped_file_avoid_mmap_posix implementation."

net/disk_cache/disk_cache_test_util.h

Index: net/disk_cache/disk_cache_test_util.h
diff --git a/net/disk_cache/disk_cache_test_util.h b/net/disk_cache/disk_cache_test_util.h
index bacf54f0d4c2b9f9776c62d9d06120309d6642b3..24590ce984f6e24228f8f76af8fc927c84075816 100644
--- a/net/disk_cache/disk_cache_test_util.h
+++ b/net/disk_cache/disk_cache_test_util.h
@@ -16,9 +16,6 @@
 // Re-creates a given test file inside the cache test folder.
 bool CreateCacheTestFile(const base::FilePath& name);
 
-// Re-creates a given test file inside the cache test folder of the given size.
-bool CreateCacheTestFileWithSize(const base::FilePath& name, size_t size);
-
 // Deletes all file son the cache.
 bool DeleteCache(const base::FilePath& path);