Move GetFileSize, NormalizeFilePath to base namespace

base/test/test_file_util_mac.cc

Index: base/test/test_file_util_mac.cc
diff --git a/base/test/test_file_util_mac.cc b/base/test/test_file_util_mac.cc
index 3af2c105d9cbce0bde1d63aa16a8ce105fe23698..d31a9a65becae19bf0e7cb444041ed26e601d33c 100644
--- a/base/test/test_file_util_mac.cc
+++ b/base/test/test_file_util_mac.cc
@@ -20,7 +20,7 @@ bool EvictFileFromSystemCache(const base::FilePath& file) {
   // open should then have to load the file from disk.
 
   int64 length;
-  if (!file_util::GetFileSize(file, &length)) {
+  if (!base::GetFileSize(file, &length)) {
     DLOG(ERROR) << "failed to get size of " << file.value();
     return false;
   }