Move GetFileSize, NormalizeFilePath to base namespace

courgette/courgette_tool.cc

Index: courgette/courgette_tool.cc
diff --git a/courgette/courgette_tool.cc b/courgette/courgette_tool.cc
index a487ce90dde5bed87e3139c10fb539864b64b58d..3b5b5e68c398dfde113908c6213d64eae32efe2f 100644
--- a/courgette/courgette_tool.cc
+++ b/courgette/courgette_tool.cc
@@ -49,7 +49,7 @@ void Problem(const char* format, ...) {
 
 std::string ReadOrFail(const base::FilePath& file_name, const char* kind) {
   int64 file_size = 0;
-  if (!file_util::GetFileSize(file_name, &file_size))
+  if (!base::GetFileSize(file_name, &file_size))
     Problem("Can't read %s file.", kind);
   std::string buffer;
   buffer.reserve(static_cast<size_t>(file_size));