Move temp file functions to base namespace.

BUG=

Review URL: https://codereview.chromium.org/99923002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238427 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/printing/backend/cups_helper.cc b/printing/backend/cups_helper.cc
index 1ed04cb..5636f089 100644
--- a/printing/backend/cups_helper.cc
+++ b/printing/backend/cups_helper.cc
@@ -341,7 +341,7 @@
     const std::string& printer_capabilities,
     PrinterSemanticCapsAndDefaults* printer_info) {
   base::FilePath ppd_file_path;
-  if (!file_util::CreateTemporaryFile(&ppd_file_path))
+  if (!base::CreateTemporaryFile(&ppd_file_path))
     return false;
 
   int data_size = printer_capabilities.length();