Forward visibility explicitly in GN component.

ui/ozone/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/ui.gni")
 import("//ui/ozone/ozone.gni")
 import("//testing/test.gni")
 
 assert(use_ozone)
 
@@ skipping 150 matching lines @@
   deps += ozone_platform_deps
 
   # Platforms are always linked into //ui/ozone and can include our headers.
   allow_circular_includes_from = ozone_platform_deps
 
   # This is used for platform tests.
   visibility += [ "//ui/ozone/platform/*" ]
 }
 
 component("ozone") {
+  visibility = []
+  visibility = [ "*" ]
   public_deps = [
     ":platform",
   ]
 }
 
 # GYP version: ui/ozone/ozone.gyp:generate_ozone_platform_list
 action("generate_ozone_platform_list") {
   script = "generate_ozone_platform_list.py"
   outputs = [
     platform_list_cc_file,
@@ skipping 49 matching lines @@
     "//ui/gfx/geometry",
   ]
 
   # Add tests of platform internals.
   deps += ozone_platform_test_deps
 
   # Platform tests link ozone statically. Make sure we're not getting a
   # 2nd copy of any code via the component.
   assert_no_deps = [ "//ui/ozone" ]
 }