Remove reference to NativeFileSystemAPI from flags

This change removes a reference to NativeFileSystemAPI from the flag
description for FileHandlingAPI.

NativeFileSystemAPI has been enabled by default (crrev.com/c/2360922)
so is no longer an available flag.

Change-Id: Ib17b734f3cf18eacfd11df7aae891bd5526fc649
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2508320
Reviewed-by: David Bienvenu <[email protected]>
Commit-Queue: Jesse McKenna <[email protected]>
Cr-Commit-Position: refs/heads/master@{#822432}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 156423d7..e1ec2e1 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -1137,7 +1137,7 @@
 const char kFileHandlingAPIName[] = "File Handling API";
 const char kFileHandlingAPIDescription[] =
     "Enables the file handling API, allowing websites to register as file "
-    "handlers. This depends on native-file-system";
+    "handlers.";
 
 const char kFillOnAccountSelectName[] = "Fill passwords on account selection";
 const char kFillOnAccountSelectDescription[] =