Move temp file functions to base namespace.

base/files/scoped_temp_dir.cc

Index: base/files/scoped_temp_dir.cc
diff --git a/base/files/scoped_temp_dir.cc b/base/files/scoped_temp_dir.cc
index 497799e9f72b7bf986c772a42acc9861e34e08d0..5624a061941361f1dadcce2bf7d9de877269accd 100644
--- a/base/files/scoped_temp_dir.cc
+++ b/base/files/scoped_temp_dir.cc
@@ -23,8 +23,7 @@ bool ScopedTempDir::CreateUniqueTempDir() {
 
   // This "scoped_dir" prefix is only used on Windows and serves as a template
   // for the unique name.
-  if (!file_util::CreateNewTempDirectory(FILE_PATH_LITERAL("scoped_dir"),
-                                         &path_))
+  if (!base::CreateNewTempDirectory(FILE_PATH_LITERAL("scoped_dir"), &path_))
     return false;
 
   return true;
@@ -39,10 +38,9 @@ bool ScopedTempDir::CreateUniqueTempDirUnderPath(const FilePath& base_path) {
     return false;
 
   // Create a new, uniquely named directory under |base_path|.
-  if (!file_util::CreateTemporaryDirInDir(
-          base_path,
-          FILE_PATH_LITERAL("scoped_dir_"),
-          &path_))
+  if (!base::CreateTemporaryDirInDir(base_path,
+                                     FILE_PATH_LITERAL("scoped_dir_"),
+                                     &path_))
     return false;
 
   return true;