🐳 Move linux pkg_config() calls into separate BUILD.gn files

ui/base/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
@@ skipping 869 matching lines @@
 
   if (is_android) {
     deps += [
       "//chrome:resources",
       "//ui/android:ui_java",
     ]
     isolate_file = "ui_base_tests.isolate"
   }
 
   if (use_pango) {
-    configs += [ "//build/config/linux:pangocairo" ]
+    configs += [ "//build/config/linux/pangocairo" ]
   }
 
   if (use_x11) {
     sources += [ "cursor/cursor_loader_x11_unittest.cc" ]
 
     configs += [ "//build/config/linux:x11" ]
 
     deps += [
       "//ui/events/platform/x11",
       "//ui/gfx/x",
@@ skipping 65 matching lines @@
 if (is_mac) {
   mac_framework_bundle("ui_unittests_framework") {
     testonly = true
     deps = [
       "//ui/resources:ui_test_pak_bundle_data",
     ]
     info_plist = "test/framework-Info.plist"
     output_name = "ui_unittests Framework"
   }
 }