Move scoped_temp_dir from base to base/files

chrome/installer/util/create_dir_work_item_unittest.cc

Index: chrome/installer/util/create_dir_work_item_unittest.cc
diff --git a/chrome/installer/util/create_dir_work_item_unittest.cc b/chrome/installer/util/create_dir_work_item_unittest.cc
index 6d97bbe932212fe390be786ebf48ac227017f6dc..76db1a64126a1c8f7b7a9ce1a2a94c006fa68ad0 100644
--- a/chrome/installer/util/create_dir_work_item_unittest.cc
+++ b/chrome/installer/util/create_dir_work_item_unittest.cc
@@ -6,9 +6,9 @@
 
 #include "base/base_paths.h"
 #include "base/file_util.h"
+#include "base/files/scoped_temp_dir.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
-#include "base/scoped_temp_dir.h"
 #include "base/string_util.h"
 #include "chrome/installer/util/create_dir_work_item.h"
 #include "chrome/installer/util/work_item.h"
@@ -21,7 +21,7 @@ namespace {
       ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     }
 
-    ScopedTempDir temp_dir_;
+    base::ScopedTempDir temp_dir_;
   };
 };