Move temp file functions to base namespace.

chrome/browser/extensions/api/image_writer_private/operation.cc

Index: chrome/browser/extensions/api/image_writer_private/operation.cc
diff --git a/chrome/browser/extensions/api/image_writer_private/operation.cc b/chrome/browser/extensions/api/image_writer_private/operation.cc
index dcd147f4ecf03340fc5f8f8e9f1405b114ccafff..1f1f303bc44e3b8bdbf5b52a31795236934663b5 100644
--- a/chrome/browser/extensions/api/image_writer_private/operation.cc
+++ b/chrome/browser/extensions/api/image_writer_private/operation.cc
@@ -179,9 +179,9 @@ void Operation::UnzipStart(scoped_ptr<base::FilePath> zip_file) {
   SetStage(image_writer_api::STAGE_UNZIP);
 
   base::FilePath tmp_dir;
-  if (!file_util::CreateTemporaryDirInDir(zip_file->DirName(),
-                                          FILE_PATH_LITERAL("image_writer"),
-                                          &tmp_dir)) {
+  if (!base::CreateTemporaryDirInDir(zip_file->DirName(),
+                                     FILE_PATH_LITERAL("image_writer"),
+                                     &tmp_dir)) {
     Error(error::kTempDir);
     return;
   }