GN + Android: allow to set visibility on android_library targets.

build/config/android/rules.gni

 # 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("//base/android/linker/config.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/internal_rules.gni")
 import("//tools/grit/grit_rule.gni")
 import("//tools/relocation_packer/config.gni")
 
@@ skipping 830 matching lines @@
     if (defined(invoker.chromium_code)) { chromium_code = invoker.chromium_code }
     if (defined(invoker.datadeps)) { deps = invoker.datadeps }
     if (defined(invoker.deps)) { deps = invoker.deps }
     if (defined(invoker.jar_excluded_patterns)) { jar_excluded_patterns = invoker.jar_excluded_patterns }
     if (defined(invoker.java_files)) { java_files = invoker.java_files }
     if (defined(invoker.proguard_config)) { proguard_config = invoker.proguard_config }
     if (defined(invoker.proguard_preprocess)) { proguard_preprocess = invoker.proguard_preprocess }
     if (defined(invoker.srcjar_deps)) { srcjar_deps = invoker.srcjar_deps }
     if (defined(invoker.srcjars)) { srcjars = invoker.srcjars }
     if (defined(invoker.testonly)) { testonly = invoker.testonly }
+    if (defined(invoker.visibility)) { visibility = invoker.visibility }
     if (defined(invoker.dex_path)) { dex_path = invoker.dex_path }
 
     supports_android = true
     requires_android = true
 
     if (!defined(jar_excluded_patterns)) { jar_excluded_patterns = [] }
     jar_excluded_patterns += [
       "*/R.class", "*/R##*.class",
       "*/Manifest.class", "*/Manifest##*.class",
     ]
@@ skipping 632 matching lines @@
 }
 
 # TODO(GYP): implement this.
 template("uiautomator_test") {
   if (defined(invoker.testonly)) { testonly = invoker.testonly }
   assert(target_name != "")
   assert(invoker.deps != [] || true)
   group(target_name) {
   }
 }