Initial support for accessibility actions on ARC.

chrome/browser/ui/aura/accessibility/automation_manager_aura.cc

Index: chrome/browser/ui/aura/accessibility/automation_manager_aura.cc
diff --git a/chrome/browser/ui/aura/accessibility/automation_manager_aura.cc b/chrome/browser/ui/aura/accessibility/automation_manager_aura.cc
index 06bfc0f172ca4a6c131908e5f44ce4aa609f4ea8..3ee579452b2fe058a0284d52e0cd5f6cbc83e65c 100644
--- a/chrome/browser/ui/aura/accessibility/automation_manager_aura.cc
+++ b/chrome/browser/ui/aura/accessibility/automation_manager_aura.cc
@@ -18,6 +18,7 @@
 #include "content/public/browser/browser_context.h"
 #include "ui/accessibility/ax_action_data.h"
 #include "ui/accessibility/ax_enums.h"
+#include "ui/accessibility/ax_tree_id_registry.h"
 #include "ui/aura/env.h"
 #include "ui/aura/window.h"
 #include "ui/views/accessibility/ax_aura_obj_wrapper.h"
@@ -146,7 +147,9 @@ void AutomationManagerAura::OnChildWindowRemoved(
 }
 
 AutomationManagerAura::AutomationManagerAura()
-    : enabled_(false), processing_events_(false) {}
+    : enabled_(false), processing_events_(false) {
+  ui::AXTreeIDRegistry::GetInstance()->SetDesktopHostDelegate(this);
+}
 
 AutomationManagerAura::~AutomationManagerAura() {
 }