Move Touch to base namespace, remove SetLastModifiedTime.

chrome/browser/chromeos/file_manager/file_manager_browsertest.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.
 
 // Browser test for basic Chrome OS file manager functionality:
 //  - The file list is updated when a file is added externally to the Downloads
 //    folder.
 //  - Selecting a file and copy-pasting it with the keyboard copies the file.
 //  - Selecting a file and pressing delete deletes it.
 
@@ skipping 218 matching lines @@
         break;
     }
     ASSERT_TRUE(UpdateModifiedTime(entry));
   }
 
  private:
   // Updates ModifiedTime of the entry and its parents by referring
   // TestEntryInfo. Returns true on success.
   bool UpdateModifiedTime(const TestEntryInfo& entry) {
     const base::FilePath path = local_path_.AppendASCII(entry.target_path);
-    if (!file_util::SetLastModifiedTime(path, entry.last_modified_time))
+    if (!base::TouchFile(path, entry.last_modified_time,
+                         entry.last_modified_time))
       return false;
 
     // Update the modified time of parent directories because it may be also
     // affected by the update of child items.
     if (path.DirName() != local_path_) {
       const std::map<base::FilePath, const TestEntryInfo>::iterator it =
           entries_.find(path.DirName());
       if (it == entries_.end())
         return false;
       return UpdateModifiedTime(it->second);
@@ skipping 482 matching lines @@
     ::testing::Values(TestParameter(NOT_IN_GUEST_MODE, "searchBoxFocus")));
 
 INSTANTIATE_TEST_CASE_P(
     Thumbnails,
     FileManagerBrowserTest,
     ::testing::Values(TestParameter(NOT_IN_GUEST_MODE, "thumbnailsDownloads"),
                       TestParameter(IN_GUEST_MODE, "thumbnailsDownloads")));
 
 }  // namespace
 }  // namespace file_manager