Move GetFileSize, NormalizeFilePath to base namespace

third_party/leveldatabase/env_chromium.cc

Index: third_party/leveldatabase/env_chromium.cc
diff --git a/third_party/leveldatabase/env_chromium.cc b/third_party/leveldatabase/env_chromium.cc
index e0ab97d503f8af5856a03d5ddb51c082191a2fbd..ee36b14b8d64c4a8a30af8addcfc8eab303fef61 100644
--- a/third_party/leveldatabase/env_chromium.cc
+++ b/third_party/leveldatabase/env_chromium.cc
@@ -863,7 +863,7 @@ Status ChromiumEnv::DeleteDir(const std::string& name) {
 Status ChromiumEnv::GetFileSize(const std::string& fname, uint64_t* size) {
   Status s;
   int64_t signed_size;
-  if (!::file_util::GetFileSize(CreateFilePath(fname), &signed_size)) {
+  if (!::base::GetFileSize(CreateFilePath(fname), &signed_size)) {
     *size = 0;
     s = MakeIOError(fname, "Could not determine file size.", kGetFileSize);
     RecordErrorAt(kGetFileSize);