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

chrome/browser/download/download_path_reservation_tracker_unittest.cc

 // Copyright (c) 2012 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"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop.h"
 #include "base/observer_list.h"
@@ skipping 482 matching lines @@
   }
   item->SetState(DownloadItem::COMPLETE);
 }
 
 // If the default download directory doesn't exist, then it should be
 // created. But only if we are actually going to create the download path there.
 TEST_F(DownloadPathReservationTrackerTest, CreateDefaultDownloadPath) {
   base::FilePath path(
       GetPathInDownloadsDirectory(FILE_PATH_LITERAL("foo/foo.txt")));
   base::FilePath dir(path.DirName());
-  ASSERT_FALSE(file_util::DirectoryExists(dir));
+  ASSERT_FALSE(base::DirectoryExists(dir));
   DownloadPathReservationTracker::FilenameConflictAction conflict_action =
     DownloadPathReservationTracker::OVERWRITE;
   bool create_directory = false;
 
   {
     scoped_ptr<FakeDownloadItem> item(CreateDownloadItem(1));
     base::FilePath reserved_path;
     bool verified = true;
     CallGetReservedPath(
         item.get(),
@@ skipping 14 matching lines @@
     set_default_download_path(dir);
     CallGetReservedPath(
         item.get(),
         path,
         create_directory,
         conflict_action,
         &reserved_path,
         &verified);
     // Verification succeeds because the directory is created.
     EXPECT_TRUE(verified);
-    EXPECT_TRUE(file_util::DirectoryExists(dir));
+    EXPECT_TRUE(base::DirectoryExists(dir));
     item->SetState(DownloadItem::COMPLETE);
   }
 }
 
 // If the target path of the download item changes, the reservation should be
 // updated to match.
 TEST_F(DownloadPathReservationTrackerTest, UpdatesToTargetPath) {
   scoped_ptr<FakeDownloadItem> item(CreateDownloadItem(1));
   base::FilePath path(
       GetPathInDownloadsDirectory(FILE_PATH_LITERAL("foo.txt")));
@@ skipping 142 matching lines @@
       create_directory,
       conflict_action,
       &reserved_path,
       &verified);
   // We cannot truncate a path with very long extension.
   EXPECT_FALSE(verified);
   item->SetState(DownloadItem::COMPLETE);
 }
 
 #endif