Add about::/flags for subresource redirect

Bug: 995443
Change-Id: I3e468ccacc4c8391ae6d1616608dcc76fd8335e7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1766440
Reviewed-by: Robert Ogden <[email protected]>
Reviewed-by: Tarun Bansal <[email protected]>
Commit-Queue: Sean Harrison <[email protected]>
Cr-Commit-Position: refs/heads/master@{#690807}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 8f5262a..edea588 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -516,6 +516,9 @@
 extern const char kEnableSensorContentSettingName[];
 extern const char kEnableSensorContentSettingDescription[];
 
+extern const char kEnableSubresourceRedirectName[];
+extern const char kEnableSubresourceRedirectDescription[];
+
 extern const char kEnableSyncUSSBookmarksName[];
 extern const char kEnableSyncUSSBookmarksDescription[];