Move PathIsWritable, DirectoryExists, ContentsEqual, and TextContentsEqual to the base namespace.

chrome/installer/util/copy_tree_work_item.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 "chrome/installer/util/copy_tree_work_item.h"
 
 #include <shlwapi.h>
 
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 20 matching lines @@
 bool CopyTreeWorkItem::Do() {
   if (!base::PathExists(source_path_)) {
     LOG(ERROR) << source_path_.value() << " does not exist";
     return false;
   }
 
   bool dest_exist = base::PathExists(dest_path_);
   // handle overwrite_option_ = IF_DIFFERENT case.
   if ((dest_exist) &&
       (overwrite_option_ == WorkItem::IF_DIFFERENT) &&  // only for single file
-      (!file_util::DirectoryExists(source_path_)) &&
-      (!file_util::DirectoryExists(dest_path_)) &&
-      (file_util::ContentsEqual(source_path_, dest_path_))) {
+      (!base::DirectoryExists(source_path_)) &&
+      (!base::DirectoryExists(dest_path_)) &&
+      (base::ContentsEqual(source_path_, dest_path_))) {
     VLOG(1) << "Source file " << source_path_.value()
             << " and destination file " << dest_path_.value()
             << " are exactly same. Returning true.";
     return true;
   } else if ((dest_exist) &&
              (overwrite_option_ == WorkItem::NEW_NAME_IF_IN_USE) &&
-             (!file_util::DirectoryExists(source_path_)) &&
-             (!file_util::DirectoryExists(dest_path_)) &&
+             (!base::DirectoryExists(source_path_)) &&
+             (!base::DirectoryExists(dest_path_)) &&
              (IsFileInUse(dest_path_))) {
     // handle overwrite_option_ = NEW_NAME_IF_IN_USE case.
     if (alternative_path_.empty() ||
         base::PathExists(alternative_path_) ||
         !base::CopyFile(source_path_, alternative_path_)) {
       LOG(ERROR) << "failed to copy " << source_path_.value()
                  << " to " << alternative_path_.value();
       return false;
     } else {
       copied_to_alternate_path_ = true;
@@ skipping 68 matching lines @@
     return false;
 
   HANDLE handle = ::CreateFile(path.value().c_str(), FILE_ALL_ACCESS,
                                NULL, NULL, OPEN_EXISTING, NULL, NULL);
   if (handle  == INVALID_HANDLE_VALUE)
     return true;
 
   CloseHandle(handle);
   return false;
 }