Move directory creation functions to base namespace.

third_party/zlib/google/zip_reader.cc

Index: third_party/zlib/google/zip_reader.cc
diff --git a/third_party/zlib/google/zip_reader.cc b/third_party/zlib/google/zip_reader.cc
index 862e29a0f3103f02afb32b28743f824595a61cfa..6ea8025094151de4bb83a7947057b0b6dc616387 100644
--- a/third_party/zlib/google/zip_reader.cc
+++ b/third_party/zlib/google/zip_reader.cc
@@ -192,7 +192,7 @@ bool ZipReader::ExtractCurrentEntryToFilePath(
 
   // If this is a directory, just create it and return.
   if (current_entry_info()->is_directory())
-    return file_util::CreateDirectory(output_file_path);
+    return base::CreateDirectory(output_file_path);
 
   const int open_result = unzOpenCurrentFile(zip_file_);
   if (open_result != UNZ_OK)
@@ -201,7 +201,7 @@ bool ZipReader::ExtractCurrentEntryToFilePath(
   // We can't rely on parent directory entries being specified in the
   // zip, so we make sure they are created.
   base::FilePath output_dir_path = output_file_path.DirName();
-  if (!file_util::CreateDirectory(output_dir_path))
+  if (!base::CreateDirectory(output_dir_path))
     return false;
 
   net::FileStream stream(NULL);