Enable hiding CCT header on module managed URLs.

This is guarded by the CCTModuleCustomHeader Finch feature.

Bug: 882404
Change-Id: I873acffd037660ab4d4ced908cce4c8b7e8aad6e
Reviewed-on: https://chromium-review.googlesource.com/c/1326009
Reviewed-by: Avi Drissman <[email protected]>
Reviewed-by: Michael van Ouwerkerk <[email protected]>
Reviewed-by: Ted Choc <[email protected]>
Commit-Queue: John Lin <[email protected]>
Cr-Commit-Position: refs/heads/master@{#610072}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index ca7c5e32..dae8a8c4 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -1346,6 +1346,9 @@
 extern const char kCCTModuleCacheName[];
 extern const char kCCTModuleCacheDescription[];
 
+extern const char kCCTModuleCustomHeaderName[];
+extern const char kCCTModuleCustomHeaderDescription[];
+
 extern const char kCCTModulePostMessageName[];
 extern const char kCCTModulePostMessageDescription[];