Move more file_util functions to base namespace.

content/child/npapi/plugin_stream_posix.cc

Index: content/child/npapi/plugin_stream_posix.cc
diff --git a/content/child/npapi/plugin_stream_posix.cc b/content/child/npapi/plugin_stream_posix.cc
index b84a6d9d0ca47e6a5bb016669eaba9484acbbbc0..8c74d83cd2c978ba07ac448fdb767ade8d28d2db 100644
--- a/content/child/npapi/plugin_stream_posix.cc
+++ b/content/child/npapi/plugin_stream_posix.cc
@@ -34,7 +34,7 @@ bool PluginStream::OpenTempFile() {
   DCHECK_EQ(static_cast<FILE*>(NULL), temp_file_);
 
   if (base::CreateTemporaryFile(&temp_file_path_))
-    temp_file_ = file_util::OpenFile(temp_file_path_, "a");
+    temp_file_ = base::OpenFile(temp_file_path_, "a");
 
   if (!temp_file_) {
     base::DeleteFile(temp_file_path_, false);
@@ -48,7 +48,7 @@ void PluginStream::CloseTempFile() {
   if (!TempFileIsValid())
     return;
 
-  file_util::CloseFile(temp_file_);
+  base::CloseFile(temp_file_);
   ResetTempFileHandle();
 }