Move more file_util functions to base namespace.

chrome/installer/util/duplicate_tree_detector.cc

Index: chrome/installer/util/duplicate_tree_detector.cc
diff --git a/chrome/installer/util/duplicate_tree_detector.cc b/chrome/installer/util/duplicate_tree_detector.cc
index 62d9b51da5418d6358abfafc1e998dbef87c525b..a55c0487f68d194aaff9c53e6ae21734cf092ccd 100644
--- a/chrome/installer/util/duplicate_tree_detector.cc
+++ b/chrome/installer/util/duplicate_tree_detector.cc
@@ -17,8 +17,8 @@ bool IsIdenticalFileHierarchy(const base::FilePath& src_path,
   base::PlatformFileInfo dest_info;
 
   bool is_identical = false;
-  if (file_util::GetFileInfo(src_path, &src_info) &&
-      file_util::GetFileInfo(dest_path, &dest_info)) {
+  if (base::GetFileInfo(src_path, &src_info) &&
+      base::GetFileInfo(dest_path, &dest_info)) {
     // Both paths exist, check the types:
     if (!src_info.is_directory && !dest_info.is_directory) {
       // Two files are "identical" if the file sizes are equivalent.