Remove simple_util::GetMTime from simple cache.

net/disk_cache/simple/simple_index_file.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_index_file.h"
 
 #include <vector>
 
 #include "base/file_util.h"
 #include "base/files/memory_mapped_file.h"
@@ skipping 224 matching lines @@
     INDEX_STATE_FRESH = 2,
     INDEX_STATE_FRESH_CONCURRENT_UPDATES = 3,
     INDEX_STATE_MAX = 4,
   } index_file_state;
 
   // Only load if the index is not stale.
   if (IsIndexFileStale(cache_last_modified, index_file_path)) {
     index_file_state = INDEX_STATE_STALE;
   } else {
     index_file_state = INDEX_STATE_FRESH;
-    base::Time latest_dir_mtime;
-    if (simple_util::GetMTime(cache_directory, &latest_dir_mtime) &&
-        IsIndexFileStale(latest_dir_mtime, index_file_path)) {
+    base::PlatformFileInfo file_info;
+    bool file_info_result = file_util::GetFileInfo(index_file_path, &file_info);
+    DCHECK(file_info_result);
+    if (IsIndexFileStale(file_info.last_modified, index_file_path)) {
       // A file operation has updated the directory since we last looked at it
       // during backend initialization.
       index_file_state = INDEX_STATE_FRESH_CONCURRENT_UPDATES;
     }
 
     const base::TimeTicks start = base::TimeTicks::Now();
     SyncLoadFromDisk(index_file_path, out_result);
     UMA_HISTOGRAM_TIMES("SimpleCache.IndexLoadTime",
                         base::TimeTicks::Now() - start);
     UMA_HISTOGRAM_COUNTS("SimpleCache.IndexEntriesLoaded",
@@ skipping 153 matching lines @@
   }
   out_result->did_load = true;
   // When we restore from disk we write the merged index file to disk right
   // away, this might save us from having to restore again next time.
   out_result->flush_required = true;
 }
 
 // static
 bool SimpleIndexFile::IsIndexFileStale(base::Time cache_last_modified,
                                        const base::FilePath& index_file_path) {
-  base::Time index_mtime;
-  if (!simple_util::GetMTime(index_file_path, &index_mtime))
+  base::PlatformFileInfo file_info;
+  if (!file_util::GetFileInfo(index_file_path, &file_info))
     return true;
-  return index_mtime < cache_last_modified;
+  return file_info.last_modified < cache_last_modified;
 }
 
 }  // namespace disk_cache