Re-land: Resurrect Aura Linux accessibility.

ui/views/accessibility/native_view_accessibility.cc

Index: ui/views/accessibility/native_view_accessibility.cc
diff --git a/ui/views/accessibility/native_view_accessibility.cc b/ui/views/accessibility/native_view_accessibility.cc
index aeb2c7071a2b9e46cd3d89dded5b6a2bfbc29973..a11f773d62a67e816bda3fb3a240bd1bed693905 100644
--- a/ui/views/accessibility/native_view_accessibility.cc
+++ b/ui/views/accessibility/native_view_accessibility.cc
@@ -13,7 +13,7 @@
 
 namespace views {
 
-#if !defined(OS_WIN)
+#if !defined(OS_WIN) && !(defined(OS_LINUX) && !defined(OS_CHROMEOS))
 // static
 NativeViewAccessibility* NativeViewAccessibility::Create(View* view) {
   return new NativeViewAccessibility(view);
@@ -23,7 +23,8 @@ NativeViewAccessibility* NativeViewAccessibility::Create(View* view) {
 NativeViewAccessibility::NativeViewAccessibility(View* view)
     : view_(view),
       parent_widget_(nullptr),
-      ax_node_(ui::AXPlatformNode::Create(this)) {
+      ax_node_(nullptr) {
+  ax_node_ = ui::AXPlatformNode::Create(this);
 }
 
 NativeViewAccessibility::~NativeViewAccessibility() {