Hide AXPlatformNode on ChromeOS.

ui/accessibility/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/linux/pkg_config.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//tools/json_schema_compiler/json_schema_api.gni")
+import("//ui/base/ui_features.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
 
 component("accessibility") {
   sources = [
     "ax_action_data.cc",
     "ax_action_data.h",
     "ax_host_delegate.cc",
@@ skipping 21 matching lines @@
     "ax_tree_data.cc",
     "ax_tree_data.h",
     "ax_tree_id_registry.cc",
     "ax_tree_id_registry.h",
     "ax_tree_serializer.cc",
     "ax_tree_serializer.h",
     "ax_tree_source.h",
     "ax_tree_update.h",
     "platform/ax_android_constants.cc",
     "platform/ax_android_constants.h",
-    "platform/ax_platform_node.cc",
-    "platform/ax_platform_node.h",
-    "platform/ax_platform_node_base.cc",
-    "platform/ax_platform_node_base.h",
-    "platform/ax_platform_node_delegate.h",
-    "platform/ax_platform_node_mac.h",
-    "platform/ax_platform_node_mac.mm",
-    "platform/ax_platform_node_win.cc",
-    "platform/ax_platform_node_win.h",
+    "platform/ax_platform_unique_id.cc",
+    "platform/ax_platform_unique_id.h",
   ]
 
+  if (has_native_accessibility) {
+    sources += [
+      "platform/ax_platform_node.cc",
+      "platform/ax_platform_node.h",
+      "platform/ax_platform_node_base.cc",
+      "platform/ax_platform_node_base.h",
+      "platform/ax_platform_node_delegate.h",
+      "platform/ax_platform_node_mac.h",
+      "platform/ax_platform_node_mac.mm",
+      "platform/ax_platform_node_win.cc",
+      "platform/ax_platform_node_win.h",
+    ]
+  }
+
   defines = [ "ACCESSIBILITY_IMPLEMENTATION" ]
 
   public_deps = [
     ":ax_gen",
     "//base",
     "//base:i18n",
     "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/strings",
@@ skipping 36 matching lines @@
 
   java_cpp_enum("ax_enumerations_srcjar") {
     sources = [
       "ax_enums.idl",
     ]
   }
 }
 
 static_library("test_support") {
   sources = [
-    "platform/test_ax_node_wrapper.cc",
-    "platform/test_ax_node_wrapper.h",
     "tree_generator.cc",
     "tree_generator.h",
   ]
 
+  if (is_win) {
+    sources += [
+      "platform/test_ax_node_wrapper.cc",
+      "platform/test_ax_node_wrapper.h",
+    ]
+  }
+
   deps = [
     ":accessibility",
   ]
 }
 
 test("accessibility_unittests") {
   sources = [
     "ax_generated_tree_unittest.cc",
     "ax_node_position_unittest.cc",
     "ax_text_utils_unittest.cc",
@@ skipping 34 matching lines @@
 
 fuzzer_test("ax_tree_fuzzer") {
   sources = [
     "ax_tree_fuzzer.cc",
   ]
 
   deps = [
     ":accessibility",
   ]
 }