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-rw-r--r--ios/web/net/request_group_util.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/ios/web/net/request_group_util.h b/ios/web/net/request_group_util.h
index 525f2d0..071f51f 100644
--- a/ios/web/net/request_group_util.h
+++ b/ios/web/net/request_group_util.h
@@ -30,6 +30,7 @@ NSString* ExtractRequestGroupIDFromUserAgent(NSString* user_agent);
// Returns a new user agent, which is the result of the encoding of
// |request_group_id| in |base_user_agent|. The request group ID can be later
// extracted with ExtractRequestGroupIDFromUserAgent().
+// If request_group_id is nil, returns base_user_agent.
NSString* AddRequestGroupIDToUserAgent(NSString* base_user_agent,
NSString* request_group_id);