Add comments to SimpleSynchronousEntry callbacks.

net/disk_cache/simple/simple_synchronous_entry.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_DISK_CACHE_SIMPLE_SIMPLE_SYNCHRONOUS_ENTRY_H_
 #define NET_DISK_CACHE_SIMPLE_SIMPLE_SYNCHRONOUS_ENTRY_H_
 
 #include <string>
 
 #include "base/callback_forward.h"
@@ skipping 17 matching lines @@
 
 // Worker thread interface to the very simple cache. This interface is not
 // thread safe, and callers must ensure that it is only ever accessed from
 // a single thread between synchronization points.
 class SimpleSynchronousEntry {
  public:
   // Callback type for the completion of creation of SimpleSynchronousEntry
   // objects, for instance after OpenEntry() or CreateEntry(). |new_entry| is
   // the newly created SimpleSynchronousEntry, constructed on the worker pool
   // thread. |new_entry| == NULL in the case of error.
-  typedef base::Callback<void(SimpleSynchronousEntry* /* new_entry */)>
+  typedef base::Callback<void(SimpleSynchronousEntry* new_entry)>
       SynchronousCreationCallback;
 
   // Callback type for IO operations on an entry not requiring special callback
   // arguments (e.g. Write). |result| is a net::Error result code.
-  typedef base::Callback<void(int /* result */)> SynchronousOperationCallback;
+  typedef base::Callback<void(int result)> SynchronousOperationCallback;
 
   static void OpenEntry(
       const base::FilePath& path,
       const std::string& key,
       const scoped_refptr<base::TaskRunner>& callback_runner,
       const SynchronousCreationCallback& callback);
 
   static void CreateEntry(
       const base::FilePath& path,
       const std::string& key,
@@ skipping 52 matching lines @@
   base::Time last_used_;
   base::Time last_modified_;
   int32 data_size_[kSimpleEntryFileCount];
 
   base::PlatformFile files_[kSimpleEntryFileCount];
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_SIMPLE_SIMPLE_SYNCHRONOUS_ENTRY_H_