Add FilesTrash flag

Add feature flag for adding Trash support in My files volume of FilesApp.

Bug: 953310
Change-Id: I3d06b39b77a744251a35001eb4c77bffab41383a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2461508
Reviewed-by: Noel Gordon <[email protected]>
Commit-Queue: Joel Hockey <[email protected]>
Cr-Commit-Position: refs/heads/master@{#815410}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 12dc3d9..a78225b 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -4122,6 +4122,10 @@
 const char kFilesTransferDetailsDescription[] =
     "Enable transfer details like remaining time in the progress center panel.";
 
+const char kFilesTrashName[] = "Enable Files Trash.";
+const char kFilesTrashDescription[] =
+    "Enable trash for My files volume in Files App.";
+
 const char kFilesZipMountName[] = "New ZIP mounting in Files App";
 const char kFilesZipMountDescription[] =
     "Enable new ZIP archive mounting system in File Manager.";