[Cronet] Use gn desc deps to find third_party licenses.

components/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/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 if (is_ios) {
   import("//ios/build/config.gni")
 }
 
+group("cronet") {
+  if (is_ios) {
+    deps = [
+      "//components/cronet/ios:cronet_package",

[brettw, 2016/05/03 22:13:03]

I'd actually put this in the root build file. You can add it to the condition in
both_gn_and_gyp or something (whatever is appropriate, shouldn't need a new
target).

[mef, 2016/05/11 15:57:27]

Done.

+    ]
+  }
+}
+
 if (is_ios || is_mac) {
   bundle_data("components_tests_pak_bundle_data") {
     public_deps = [
       ":components_tests_pak",
       "//ui/resources:ui_test_pak",
     ]
     sources = [
       "$root_out_dir/components_tests_resources.pak",
       "$root_out_dir/ui_test.pak",
     ]
@@ skipping 441 matching lines @@
       "//base/test:test_support_perf",
       "//components/scheduler",
       "//components/visitedlink/browser",
       "//content/test:test_support",
       "//testing/gtest",
       "//testing/perf",
       "//url",
     ]
   }
 }