Initial support for native accessibility in ARC

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

Index: chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.h
diff --git a/chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.h b/chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.h
index ad4abbd6de288d9799682095e7acc1f9f4291808..74547940a89a64cbf5172bad0331405050dd8446 100644
--- a/chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.h
+++ b/chrome/browser/chromeos/arc/accessibility/arc_accessibility_helper_bridge.h
@@ -8,11 +8,13 @@
 #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"
 
 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
@@ -20,7 +22,8 @@ class ArcBridgeService;
 class ArcAccessibilityHelperBridge
     : public ArcService,
       public mojom::AccessibilityHelperHost,
-      public InstanceHolder<mojom::AccessibilityHelperInstance>::Observer {
+      public InstanceHolder<mojom::AccessibilityHelperInstance>::Observer,
+      public exo::WMHelper::ActivationObserver {
  public:
   explicit ArcAccessibilityHelperBridge(ArcBridgeService* bridge_service);
   ~ArcAccessibilityHelperBridge() override;
@@ -29,13 +32,21 @@ class ArcAccessibilityHelperBridge
   void OnInstanceReady() override;
 
   // mojom::AccessibilityHelperHost overrides.
-  void OnAccessibilityEvent(
+  void OnAccessibilityEventDeprecated(
       mojom::AccessibilityEventType event_type,
       mojom::AccessibilityNodeInfoDataPtr event_source) override;
+  void OnAccessibilityEvent(
+      mojom::AccessibilityEventDataPtr event_data) override;
 
  private:
+  // exo::WMHelper::ActivationObserver overrides.
+  void OnWindowActivated(aura::Window* gained_active,
+                         aura::Window* lost_active) override;
+
   mojo::Binding<mojom::AccessibilityHelperHost> binding_;
 
+  std::unique_ptr<AXTreeSourceArc> tree_source_;
+
   DISALLOW_COPY_AND_ASSIGN(ArcAccessibilityHelperBridge);
 };