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 "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 {

[hidehiko, 2017/04/21 06:27:02]

Please do not declare anonymous namespace in header.

You can use nested class, instead.

[Luis Héctor Chávez, 2017/04/21 15:20:07]

If you don't want to use nested class, you can call
|static_cast<FocusStealer*>(focus_stealer_.get())| in the .cc

+class FocusStealer;
+}
+
 namespace views {
 
 class View;
 
 }  // namespace views
 
 namespace arc {
 
 class ArcBridgeService;
 class AXTreeSourceArc;
@@ skipping 13 matching lines @@
 
   // 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;
+  void OnAccessibilityTreeDestroyed() 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;
 
   mojo::Binding<mojom::AccessibilityHelperHost> binding_;
 
   std::unique_ptr<AXTreeSourceArc> tree_source_;
-  std::unique_ptr<views::View> focus_stealer_;
+  std::unique_ptr<FocusStealer> focus_stealer_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAccessibilityHelperBridge);
 };
 
 }  // namespace arc
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ACCESSIBILITY_ARC_ACCESSIBILITY_HELPER_BRIDGE_H_