Remove the '--enable-file-cookies' flag.

chrome/browser/browsing_data/browsing_data_helper.cc

Index: chrome/browser/browsing_data/browsing_data_helper.cc
diff --git a/chrome/browser/browsing_data/browsing_data_helper.cc b/chrome/browser/browsing_data/browsing_data_helper.cc
index 9aa633ec63b81464bf0c01b763cdcba7acce11aa..738bd9e627019a146d63bb5df21fc91533ba1bb6 100644
--- a/chrome/browser/browsing_data/browsing_data_helper.cc
+++ b/chrome/browser/browsing_data/browsing_data_helper.cc
@@ -15,14 +15,7 @@
 
 // Static
 bool BrowsingDataHelper::IsWebScheme(const std::string& scheme) {
-  // Special-case `file://` scheme iff cookies and site data are enabled via
-  // the `--allow-file-cookies` CLI flag.
-  if (scheme == url::kFileScheme) {
-    return base::CommandLine::ForCurrentProcess()->HasSwitch(
-        switches::kEnableFileCookies);
-  }
-
-  // Otherwise, all "web safe" schemes are valid, except `chrome-extension://`
+  // All "web safe" schemes are valid, except `chrome-extension://`
   // and `chrome-devtools://`.
   content::ChildProcessSecurityPolicy* policy =
       content::ChildProcessSecurityPolicy::GetInstance();