Expand Chrome OS ARC support to create one tree source per package

chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_ARC_ACCESSIBILITY_ARC_ACCESSIBILITY_HELPER_BRIDGE_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ACCESSIBILITY_ARC_ACCESSIBILITY_HELPER_BRIDGE_H_
 
 #include <memory>
 
+#include "chrome/browser/chromeos/arc/accessibility/ax_tree_source_arc.h"
+#include "chrome/browser/ui/app_list/arc/arc_app_list_prefs.h"
 #include "components/arc/arc_service.h"
 #include "components/arc/common/accessibility_helper.mojom.h"
 #include "components/arc/instance_holder.h"
 #include "components/exo/wm_helper.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "ui/accessibility/ax_host_delegate.h"
 
 namespace views {
 
 class View;
 
 }  // namespace views
 
 namespace arc {
 
 class ArcBridgeService;
 class AXTreeSourceArc;
 
 // ArcAccessibilityHelperBridge is an instance to receive converted Android
 // accessibility events and info via mojo interface and dispatch them to chrome
 // os components.
 class ArcAccessibilityHelperBridge
     : public ArcService,
       public mojom::AccessibilityHelperHost,
       public InstanceHolder<mojom::AccessibilityHelperInstance>::Observer,
       public exo::WMHelper::ActivationObserver,
-      public ui::AXHostDelegate {
+      public AXTreeSourceArc::Delegate,
+      public ArcAppListPrefs::Observer {
  public:
   explicit ArcAccessibilityHelperBridge(ArcBridgeService* bridge_service);
   ~ArcAccessibilityHelperBridge() override;
 
   // InstanceHolder<mojom::AccessibilityHelperInstance>::Observer overrides.
   void OnInstanceReady() override;
 
   // mojom::AccessibilityHelperHost overrides.
   void OnAccessibilityEventDeprecated(
       mojom::AccessibilityEventType event_type,
       mojom::AccessibilityNodeInfoDataPtr event_source) override;
   void OnAccessibilityEvent(
       mojom::AccessibilityEventDataPtr event_data) override;
 
+  // AXTreeSourceArc::Delegate overrides.
+  void OnAction(const ui::AXActionData& data) override;
+
  private:
   // exo::WMHelper::ActivationObserver overrides.
   void OnWindowActivated(aura::Window* gained_active,
                          aura::Window* lost_active) override;
 
-  // AXHostDelegate overrides.
-  void PerformAction(const ui::AXActionData& data) override;
+  // ArcAppListPrefs::Observer overrides.
+  void OnTaskCreated(int task_id,
+                     const std::string& package_name,
+                     const std::string& activity,
+                     const std::string& intent) override;
+  void OnTaskDestroyed(int task_id) override;
+  void OnTaskSetActive(int32_t task_id) override;
 
   mojo::Binding<mojom::AccessibilityHelperHost> binding_;
 
-  std::unique_ptr<AXTreeSourceArc> tree_source_;
-  std::unique_ptr<views::View> focus_stealer_;
+  std::map<int32_t, AXTreeSourceArc*> task_id_to_tree_;
+  std::map<std::string, int32_t> package_name_to_task_id_;
+  int32_t current_task_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAccessibilityHelperBridge);
 };
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ACCESSIBILITY_ARC_ACCESSIBILITY_HELPER_BRIDGE_H_