Move Copy* into the base namespace.

chrome/installer/util/move_tree_work_item_unittest.cc

Index: chrome/installer/util/move_tree_work_item_unittest.cc
diff --git a/chrome/installer/util/move_tree_work_item_unittest.cc b/chrome/installer/util/move_tree_work_item_unittest.cc
index 11dc26ec04ba916d72697598098748d87cdaf985..011f9caa650d049172701f3f1d0e3f29771b494e 100644
--- a/chrome/installer/util/move_tree_work_item_unittest.cc
+++ b/chrome/installer/util/move_tree_work_item_unittest.cc
@@ -277,7 +277,7 @@ TEST_F(MoveTreeWorkItemTest, MoveFileDestInUse) {
   base::FilePath exe_full_path(exe_full_path_str);
   base::FilePath to_file(to_dir);
   to_file = to_file.AppendASCII("To_File");
-  file_util::CopyFile(exe_full_path, to_file);
+  base::CopyFile(exe_full_path, to_file);
   ASSERT_TRUE(file_util::PathExists(to_file));
 
   // Run the executable in destination path
@@ -329,7 +329,7 @@ TEST_F(MoveTreeWorkItemTest, MoveFileInUse) {
   base::FilePath exe_full_path(exe_full_path_str);
   base::FilePath from_file(from_dir);
   from_file = from_file.AppendASCII("From_File");
-  file_util::CopyFile(exe_full_path, from_file);
+  base::CopyFile(exe_full_path, from_file);
   ASSERT_TRUE(file_util::PathExists(from_file));
 
   // Create a destination source dir and generate destination file name.