Move file_util::Delete to the base namespace

net/disk_cache/simple/simple_synchronous_entry.cc

Index: net/disk_cache/simple/simple_synchronous_entry.cc
diff --git a/net/disk_cache/simple/simple_synchronous_entry.cc b/net/disk_cache/simple/simple_synchronous_entry.cc
index d8d89bf3723c8959ff9dd2e2bb05defa486c98f2..f757b9feaee58c7c384d33c356bec5f4f37993a7 100644
--- a/net/disk_cache/simple/simple_synchronous_entry.cc
+++ b/net/disk_cache/simple/simple_synchronous_entry.cc
@@ -187,7 +187,7 @@ bool SimpleSynchronousEntry::DeleteFilesForEntryHash(
   for (int i = 0; i < kSimpleEntryFileCount; ++i) {
     FilePath to_delete = path.AppendASCII(
         GetFilenameFromEntryHashAndIndex(entry_hash, i));
-    if (!file_util::Delete(to_delete, false)) {
+    if (!base::Delete(to_delete, false)) {
       result = false;
       DLOG(ERROR) << "Could not delete " << to_delete.MaybeAsASCII();
     }