Initial support for accessibility actions on ARC.

chrome/browser/chromeos/arc/accessibility/ax_tree_source_arc.cc

 // Copyright 2017 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.
 
 #include "chrome/browser/chromeos/arc/accessibility/ax_tree_source_arc.h"
 
 #include <string>
 
 #include "chrome/browser/extensions/api/automation_internal/automation_event_router.h"
 #include "chrome/browser/ui/aura/accessibility/automation_manager_aura.h"
 #include "chrome/common/extensions/chrome_extension_messages.h"
 #include "components/exo/wm_helper.h"
-#include "ui/accessibility/ax_tree_id_registry.h"
 #include "ui/aura/window.h"
 
 namespace {
 
 ui::AXEvent ToAXEvent(arc::mojom::AccessibilityEventType arc_event_type) {
   switch (arc_event_type) {
     case arc::mojom::AccessibilityEventType::VIEW_FOCUSED:
     case arc::mojom::AccessibilityEventType::VIEW_ACCESSIBILITY_FOCUSED:
       return ui::AX_EVENT_FOCUS;
     case arc::mojom::AccessibilityEventType::VIEW_ACCESSIBILITY_FOCUS_CLEARED:
@@ skipping 58 matching lines @@
     return false;
 
   *out_value = it->second;
   return true;
 }
 
 }  // namespace
 
 namespace arc {
 
-AXTreeSourceArc::AXTreeSourceArc()
-    : tree_id_(ui::AXTreeIDRegistry::GetInstance()->CreateID()),
+AXTreeSourceArc::AXTreeSourceArc(int32_t id)
+    : tree_id_(id),
       current_tree_serializer_(new AXTreeArcSerializer(this)),
       root_id_(-1),
       focused_node_id_(-1) {}
 
 AXTreeSourceArc::~AXTreeSourceArc() {
   Reset();
 }
 
 void AXTreeSourceArc::NotifyAccessibilityEvent(
     mojom::AccessibilityEventData* event_data) {
@@ skipping 136 matching lines @@
   parent_map_.clear();
   current_tree_serializer_.reset(new AXTreeArcSerializer(this));
   root_id_ = -1;
   focused_node_id_ = -1;
   extensions::AutomationEventRouter* router =
       extensions::AutomationEventRouter::GetInstance();
   router->DispatchTreeDestroyedEvent(tree_id_, nullptr);
 }
 
 }  // namespace arc