Fix incorrect computation of LastModified in SimpleCache,

net/disk_cache/simple/simple_synchronous_entry.cc

 // 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.
 
 #include "net/disk_cache/simple/simple_synchronous_entry.h"
 
 #include <algorithm>
 #include <cstring>
 #include <functional>
 #include <limits>
@@ skipping 868 matching lines @@
     }
 
     File::Info file_info;
     bool success = files_[i].GetInfo(&file_info);
     base::Time file_last_modified;
     if (!success) {
       DLOG(WARNING) << "Could not get platform file info.";
       continue;
     }
     out_entry_stat->set_last_used(file_info.last_accessed);
-    if (simple_util::GetMTime(path_, &file_last_modified))
-      out_entry_stat->set_last_modified(file_last_modified);
-    else
-      out_entry_stat->set_last_modified(file_info.last_modified);
+    out_entry_stat->set_last_modified(file_info.last_modified);
 
     base::TimeDelta stream_age =
         base::Time::Now() - out_entry_stat->last_modified();
     if (stream_age < entry_age)
       entry_age = stream_age;
 
     // Two things prevent from knowing the right values for |data_size|:
     // 1) The key is not known, hence its length is unknown.
     // 2) Stream 0 and stream 1 are in the same file, and the exact size for
     // each will only be known when reading the EOF record for stream 0.
@@ skipping 689 matching lines @@
   range.offset = offset;
   range.length = len;
   range.data_crc32 = data_crc32;
   range.file_offset = data_file_offset;
   sparse_ranges_.insert(std::make_pair(offset, range));
 
   return true;
 }
 
 }  // namespace disk_cache