ERROR at //build/config/BUILDCONFIG.gn:533:5: Dependency not allowed.
    target(_target_type, target_name) {
    ^----------------------------------
The item //third_party/webrtc/pc:media_protocol_names
can not depend on //third_party/abseil-cpp/absl/strings:string_view
because it is not in //third_party/abseil-cpp/absl/strings:string_view's visibility list: [
  //third_party/abseil-cpp/*
  //third_party/googletest/*
  //third_party/webrtc/rtc_tools:frame_analyzer
  //third_party/webrtc/rtc_tools:rtp_generator
  //third_party/webrtc/rtc_tools:video_replay
  //chromecast/internal/*
  //libassistant/*
  //components/optimization_guide/internal/*
]


Absl used to have absl_deps, but that got removed with:
commit 99c519b3fdac0cbedaecead04a841e89a5f0f69b
Author: Florent Castelli <orphis@webrtc.org>
Date:   Thu May 23 11:21:53 2024 +0000

    Mass removal of absl_deps in all BUILD.gn files

Newer gn is fine with s/absl_deps/deps/, but bookworm's gn
requires manually changing the visibility of all the absl
libs.

--- a/third_party/abseil-cpp/absl/strings/BUILD.gn
+++ b/third_party/abseil-cpp/absl/strings/BUILD.gn
@@ -8,6 +8,7 @@ import("//third_party/abseil-cpp/absl.gn
 absl_source_set("string_view") {
   sources = [ "string_view.cc" ]
   public = [ "string_view.h" ]
+  visibility = [ "*" ]
   deps = [
     "//third_party/abseil-cpp/absl/base",
     "//third_party/abseil-cpp/absl/base:config",
@@ -58,6 +59,7 @@ absl_source_set("strings") {
     "strip.h",
     "substitute.h",
   ]
+  visibility = [ "*" ]
   public_deps = [
     # string_view.h was once part of :strings, so string_view.h is
     # re-exported for backwards compatibility.
--- a/third_party/abseil-cpp/absl/types/BUILD.gn
+++ b/third_party/abseil-cpp/absl/types/BUILD.gn
@@ -61,6 +61,7 @@ absl_test("span_test") {
 absl_source_set("optional") {
   sources = [ "internal/optional.h" ]
   public = [ "optional.h" ]
+  visibility = [ "*" ]
   public_deps = [
     ":bad_optional_access",
     "//third_party/abseil-cpp/absl/base:base_internal",
@@ -90,6 +91,7 @@ absl_source_set("bad_variant_access") {
 absl_source_set("variant") {
   sources = [ "internal/variant.h" ]
   public = [ "variant.h" ]
+  visibility = [ "*" ]
   public_deps = [
     ":bad_variant_access",
     "//third_party/abseil-cpp/absl/base:base_internal",
--- a/third_party/abseil-cpp/absl/meta/BUILD.gn
+++ b/third_party/abseil-cpp/absl/meta/BUILD.gn
@@ -6,6 +6,7 @@ import("//third_party/abseil-cpp/absl.gn
 
 absl_source_set("type_traits") {
   public = [ "type_traits.h" ]
+  visibility = [ "*" ]
   deps = [
     "//third_party/abseil-cpp/absl/base:config",
     "//third_party/abseil-cpp/absl/base:core_headers",
--- a/third_party/abseil-cpp/absl/base/BUILD.gn
+++ b/third_party/abseil-cpp/absl/base/BUILD.gn
@@ -39,6 +39,7 @@ absl_source_set("no_destructor") {
 absl_source_set("nullability") {
   sources = [ "internal/nullability_impl.h" ]
   public = [ "nullability.h" ]
+  visibility = [ "*" ]
   deps = [
     ":config",
     ":core_headers",
@@ -82,6 +83,7 @@ absl_source_set("config") {
     "options.h",
     "policy_checks.h",
   ]
+  visibility = [ "*" ]
 }
 
 absl_source_set("cycleclock_internal") {
@@ -117,6 +119,7 @@ absl_source_set("core_headers") {
     "port.h",
     "thread_annotations.h",
   ]
+  visibility = [ "*" ]
   public_deps = [ ":config" ]
 }
 
--- a/third_party/abseil-cpp/absl/algorithm/BUILD.gn
+++ b/third_party/abseil-cpp/absl/algorithm/BUILD.gn
@@ -6,11 +6,13 @@ import("//third_party/abseil-cpp/absl.gn
 
 absl_source_set("algorithm") {
   public = [ "algorithm.h" ]
+  visibility = [ "*" ]
   deps = [ "//third_party/abseil-cpp/absl/base:config" ]
 }
 
 absl_source_set("container") {
   public = [ "container.h" ]
+  visibility = [ "*" ]
   deps = [
     ":algorithm",
     "//third_party/abseil-cpp/absl/base:config",
--- a/third_party/abseil-cpp/absl/container/BUILD.gn
+++ b/third_party/abseil-cpp/absl/container/BUILD.gn
@@ -50,6 +50,7 @@ absl_source_set("inlined_vector_internal
 
 absl_source_set("inlined_vector") {
   public = [ "inlined_vector.h" ]
+  visibility = [ "*" ]
   deps = [
     ":inlined_vector_internal",
     "//third_party/abseil-cpp/absl/algorithm",
--- a/third_party/abseil-cpp/absl/numeric/BUILD.gn
+++ b/third_party/abseil-cpp/absl/numeric/BUILD.gn
@@ -9,6 +9,7 @@ absl_source_set("bits") {
     "bits.h",
     "internal/bits.h",
   ]
+  visibility = [ "*" ]
   deps = [
     "//third_party/abseil-cpp/absl/base:config",
     "//third_party/abseil-cpp/absl/base:core_headers",
--- a/third_party/abseil-cpp/absl/functional/BUILD.gn
+++ b/third_party/abseil-cpp/absl/functional/BUILD.gn
@@ -7,6 +7,7 @@ import("//third_party/abseil-cpp/absl.gn
 absl_source_set("any_invocable") {
   sources = [ "internal/any_invocable.h" ]
   public = [ "any_invocable.h" ]
+  visibility = [ "*" ]
   deps = [
     "//third_party/abseil-cpp/absl/base:base_internal",
     "//third_party/abseil-cpp/absl/base:config",
@@ -34,6 +35,7 @@ absl_test("any_invocable_test") {
 absl_source_set("bind_front") {
   sources = [ "internal/front_binder.h" ]
   public = [ "bind_front.h" ]
+  visibility = [ "*" ]
   deps = [
     "//third_party/abseil-cpp/absl/base:base_internal",
     "//third_party/abseil-cpp/absl/container:compressed_tuple",
--- a/third_party/abseil-cpp/absl/memory/BUILD.gn
+++ b/third_party/abseil-cpp/absl/memory/BUILD.gn
@@ -6,6 +6,7 @@ import("//third_party/abseil-cpp/absl.gn
 
 absl_source_set("memory") {
   public = [ "memory.h" ]
+  visibility = [ "*" ]
   deps = [
     "//third_party/abseil-cpp/absl/base:core_headers",
     "//third_party/abseil-cpp/absl/meta:type_traits",
--- a/third_party/abseil-cpp/absl/cleanup/BUILD.gn
+++ b/third_party/abseil-cpp/absl/cleanup/BUILD.gn
@@ -16,6 +16,7 @@ absl_source_set("cleanup_internal") {
 
 absl_source_set("cleanup") {
   public = [ "cleanup.h" ]
+  visibility = [ "*" ]
   deps = [
     ":cleanup_internal",
     "//third_party/abseil-cpp/absl/base:config",