File Handling: Add feature flag for file handling icon support.

Bug: 1218210
Change-Id: I35382e520c02d67e5a5ae15ce0ee892e5e3e7bf7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2950806
Reviewed-by: Chase Phillips <[email protected]>
Reviewed-by: Kent Tamura <[email protected]>
Commit-Queue: Kent Tamura <[email protected]>
Auto-Submit: Darwin Huang <[email protected]>
Cr-Commit-Position: refs/heads/master@{#893655}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 2b93f8f..ba3aeeb 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -1246,6 +1246,12 @@
     "Enables the file handling API, allowing websites to register as file "
     "handlers.";
 
+const char kFileHandlingIconsName[] = "File Handling Icons";
+const char kFileHandlingIconsDescription[] =
+    "Allows websites using the file handling API to also register file type "
+    "icons. See https://github.com/WICG/file-handling/blob/main/explainer.md "
+    "for more information.";
+
 const char kFillingAcrossAffiliatedWebsitesName[] =
     "Fill passwords across affiliated websites.";
 const char kFillingAcrossAffiliatedWebsitesDescription[] =