Add File Manager styling feature flag

Bug: 992818
Change-Id: I651778a7898e7994eae70ce1d1e7cab77c36e5c1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1748568
Reviewed-by: Alex Danilo <[email protected]>
Reviewed-by: Noel Gordon <[email protected]>
Reviewed-by: Luciano Pacheco <[email protected]>
Commit-Queue: Austin Tankiang <[email protected]>
Cr-Commit-Position: refs/heads/master@{#685933}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 1b38b1a5..74dce17 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -3297,6 +3297,10 @@
 const char kFileManagerTouchModeDescription[] =
     "Touchscreen-specific interactions of the Files app.";
 
+const char kFilesNGName[] = "Enable Files App. NG.";
+const char kFilesNGDescription[] =
+    "Enable the next generation UI style of the file manager.";
+
 const char kFirstRunUiTransitionsName[] =
     "Animated transitions in the first-run tutorial";
 const char kFirstRunUiTransitionsDescription[] =