Make SimpleEntryImpl::Doom() completely asynchronous.

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 c380c7916aba33ea7a9f736f02a34bfc75eea808..936bb96e357cd465879ec17fd7b8577b539acb3f 100644
--- a/net/disk_cache/simple/simple_synchronous_entry.cc
+++ b/net/disk_cache/simple/simple_synchronous_entry.cc
@@ -111,17 +111,6 @@ void SimpleSynchronousEntry::DoomEntry(
     callback_runner->PostTask(FROM_HERE, base::Bind(callback, net::OK));
 }
 
-void SimpleSynchronousEntry::DoomAndClose() {
-  scoped_refptr<TaskRunner> callback_runner = callback_runner_;
-  FilePath path = path_;
-  std::string key = key_;
-
-  Close();
-  // |this| is now deleted.
-
-  DoomEntry(path, key, callback_runner, net::CompletionCallback());
-}
-
 void SimpleSynchronousEntry::Close() {
   for (int i = 0; i < kSimpleEntryFileCount; ++i) {
     bool result = ClosePlatformFile(files_[i]);