Add a TouchFile function that operates on FilePaths + fixing a bug...

base/file_util.cc

 // Copyright (c) 2010 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 "base/file_util.h"
 
 #if defined(OS_WIN)
 #include <io.h>
 #endif
 #include <stdio.h>
@@ skipping 182 matching lines @@
 }
 
 bool IsDot(const FilePath& path) {
   return FILE_PATH_LITERAL(".") == path.BaseName().value();
 }
 
 bool IsDotDot(const FilePath& path) {
   return FILE_PATH_LITERAL("..") == path.BaseName().value();
 }
 
+bool TouchFile(const FilePath& path,
+               const base::Time& last_accessed,
+               const base::Time& last_modified) {
+  base::PlatformFile file =
+      base::CreatePlatformFile(path,
+                               base::PLATFORM_FILE_OPEN |
+                               base::PLATFORM_FILE_WRITE_ATTRIBUTES,
+                               NULL, NULL);
+  if (file != base::kInvalidPlatformFileValue) {
+    bool result = base::TouchPlatformFile(file, last_accessed, last_modified);
+    base::ClosePlatformFile(file);
+    return result;
+  }
+
+  return false;
+}
+
+bool SetLastModifiedTime(const FilePath& path,
+                         const base::Time& last_modified) {
+  return TouchFile(path, last_modified, last_modified);
+}
+
 bool CloseFile(FILE* file) {
   if (file == NULL)
     return true;
   return fclose(file) == 0;
 }
 
 bool TruncateFile(FILE* file) {
   if (file == NULL)
     return false;
   long current_offset = ftell(file);
@@ skipping 185 matching lines @@
 // FileEnumerator
 //
 // Note: the main logic is in file_util_<platform>.cc
 
 bool FileEnumerator::ShouldSkip(const FilePath& path) {
   FilePath::StringType basename = path.BaseName().value();
   return IsDot(path) || (IsDotDot(path) && !(INCLUDE_DOT_DOT & file_type_));
 }
 
 }  // namespace