Re-land: Implement NativeViewAccessibilityWin using AXPlatformNodeWin.

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/json_schema_api.gni")
 import("//testing/test.gni")
 
 component("accessibility") {
   sources = [
     "ax_node.cc",
@@ skipping 13 matching lines @@
     "ax_tree_update.h",
     "ax_view_state.cc",
     "ax_view_state.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.h",
+    "platform/ax_platform_node_win.cc",
   ]
 
   defines = [ "ACCESSIBILITY_IMPLEMENTATION" ]
 
   public_deps = [
     ":ax_gen",
     "//base",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
+
+  if (is_win) {
+    public_deps += [ "//third_party/iaccessible2" ]
+  }
 }
 
 source_set("test_support") {
   sources = [
+    "platform/test_ax_node_wrapper.cc",
+    "platform/test_ax_node_wrapper.h",
     "tree_generator.cc",
     "tree_generator.h",
   ]
 
   deps = [
     ":accessibility",
   ]
 }
 
 test("accessibility_unittests") {
   sources = [
     "ax_generated_tree_unittest.cc",
     "ax_text_utils_unittest.cc",
     "ax_tree_serializer_unittest.cc",
     "ax_tree_unittest.cc",
+    "platform/ax_platform_node_win_unittest.cc",
   ]
 
   deps = [
     ":accessibility",
     ":test_support",
     "//base",
     "//base/test:run_all_unittests",
     "//testing/gtest",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
+
+  if (is_win) {
+    deps += [ "//third_party/iaccessible2" ]
+  }
 }
 
 json_schema_api("ax_gen") {
   sources = [
     "ax_enums.idl",
   ]
   deps = [
     "//base/third_party/dynamic_annotations",
   ]
   root_namespace = "ui"
   schemas = true
 }