Add chromecast/* as absl client

Bug: b/155153920
Change-Id: Ieaa6f61f2ac163e0b6f1acf64a686e9fe09352f7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2249042
Reviewed-by: Mirko Bonadei <mbonadei@chromium.org>
Commit-Queue: Linkun Chen <lkchen@chromium.org>
Auto-Submit: Linkun Chen <lkchen@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#786689}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 99865b101786cfe30eacc69a0f7dbf27c0cb3e78
diff --git a/absl.gni b/absl.gni
index 2d34cd8..cfbcb43 100644
--- a/absl.gni
+++ b/absl.gni
@@ -89,6 +89,7 @@
           "//third_party/webrtc/rtc_tools:video_replay",
 
           # Not used by Chromium directly.
+          "//chromecast/internal/*",
           "//libassistant/*",
         ]
       } else {