Always use Perfetto when build_with_chromium

Bug: b/336718643
Change-Id: I64ff6babbaa8e9dabd8c877c52b23ec49a77624c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/349583
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Evan Shrubsole <eshr@google.com>
Reviewed-by: Mikhail Khokhlov <khokhlov@google.com>
Cr-Commit-Position: refs/heads/main@{#42209}
diff --git a/webrtc.gni b/webrtc.gni
index 9afe281..2077c0e 100644
--- a/webrtc.gni
+++ b/webrtc.gni
@@ -389,8 +389,7 @@
   }
 }
 
-# TODO(b/336718643): Remove use_perfetto_client_library_flag.
-if (build_with_chromium && use_perfetto_client_library) {
+if (build_with_chromium) {
   rtc_use_perfetto = true
 }