Move GetFileSize, NormalizeFilePath to base namespace

chrome/browser/chromeos/drive/file_system_util.cc

Index: chrome/browser/chromeos/drive/file_system_util.cc
diff --git a/chrome/browser/chromeos/drive/file_system_util.cc b/chrome/browser/chromeos/drive/file_system_util.cc
index 48b70cc49b5383363ad751729a0be00644c8ef90..aae3cdfd7fef39ceb5d7e81b4daa0ba074b75e45 100644
--- a/chrome/browser/chromeos/drive/file_system_util.cc
+++ b/chrome/browser/chromeos/drive/file_system_util.cc
@@ -72,7 +72,7 @@ std::string ReadStringFromGDocFile(const base::FilePath& file_path,
                                    const std::string& key) {
   const int64 kMaxGDocSize = 4096;
   int64 file_size = 0;
-  if (!file_util::GetFileSize(file_path, &file_size) ||
+  if (!base::GetFileSize(file_path, &file_size) ||
       file_size > kMaxGDocSize) {
     LOG(WARNING) << "File too large to be a GDoc file " << file_path.value();
     return std::string();