Move the rest of test_file_util to base namespace.

base/files/file_path_watcher_browsertest.cc

Index: base/files/file_path_watcher_browsertest.cc
diff --git a/base/files/file_path_watcher_browsertest.cc b/base/files/file_path_watcher_browsertest.cc
index 8f57cadda90244316a304f1aff023eea37b0e5c7..ff6d9d597317baf922aa1f2d9592a534e1e991d9 100644
--- a/base/files/file_path_watcher_browsertest.cc
+++ b/base/files/file_path_watcher_browsertest.cc
@@ -528,7 +528,7 @@ TEST_F(FilePathWatcherTest, RecursiveWatch) {
   ASSERT_TRUE(WaitForEvents());
 
   // Modify "$dir/subdir/subdir_child_dir/child_dir_file1" attributes.
-  ASSERT_TRUE(file_util::MakeFileUnreadable(child_dir_file1));
+  ASSERT_TRUE(base::MakeFileUnreadable(child_dir_file1));
   ASSERT_TRUE(WaitForEvents());
 
   // Delete "$dir/subdir/subdir_file1".
@@ -618,7 +618,7 @@ TEST_F(FilePathWatcherTest, FileAttributesChanged) {
   ASSERT_TRUE(SetupWatch(test_file(), &watcher, delegate.get(), false));
 
   // Now make sure we get notified if the file is modified.
-  ASSERT_TRUE(file_util::MakeFileUnreadable(test_file()));
+  ASSERT_TRUE(base::MakeFileUnreadable(test_file()));
   ASSERT_TRUE(WaitForEvents());
   DeleteDelegateOnFileThread(delegate.release());
 }