Temporarily increase visibility of publicly used build targets.

Bug: webrtc:9808
Change-Id: I4ad2402dc288766732a2d81a289f717deec56629
Reviewed-on: https://webrtc-review.googlesource.com/c/103460
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24981}
diff --git a/BUILD.gn b/BUILD.gn
index 6856cdc..5a1446d 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -419,6 +419,11 @@
 }
 
 rtc_source_set("webrtc_common") {
+  # Client code SHOULD NOT USE THIS TARGET, but for now it needs to be public
+  # because there exists client code that uses it.
+  # TODO(bugs.webrtc.org/9808): Move to private visibility as soon as that
+  # client code gets updated.
+  visibility = [ "*" ]
   sources = [
     "common_types.h",
   ]