Move scoped_temp_dir from base to base/files

base/file_util_unittest.cc

Index: base/file_util_unittest.cc
diff --git a/base/file_util_unittest.cc b/base/file_util_unittest.cc
index 8bee6a8066b1d126a6d57e7798dca9e9409e041b..452ee82def457b904c048ddab95357e50ff52d05 100644
--- a/base/file_util_unittest.cc
+++ b/base/file_util_unittest.cc
@@ -19,8 +19,8 @@
 #include "base/base_paths.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
+#include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
-#include "base/scoped_temp_dir.h"
 #include "base/test/test_file_util.h"
 #include "base/threading/platform_thread.h"
 #include "base/utf_string_conversions.h"
@@ -143,7 +143,7 @@ class FileUtilTest : public PlatformTest {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
   }
 
-  ScopedTempDir temp_dir_;
+  base::ScopedTempDir temp_dir_;
 };
 
 // Collects all the results from the given file enumerator, and provides an