Support focus highlight in Android window

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 "components/arc/arc_service.h"
+#include "components/arc/common/accessibility_helper.mojom.h"
+#include "components/arc/instance_holder.h"
+#include "mojo/public/cpp/bindings/binding.h"
+
+namespace arc {
+
+class ArcBridgeService;
+
+// 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:
+  explicit ArcAccessibilityHelperBridge(ArcBridgeService* bridge_service);
+  ~ArcAccessibilityHelperBridge() override;
+
+  // InstanceHolder<mojom::AccessibilityHelperInstance>::Observer overrides.
+  void OnInstanceReady() override;
+
+  // mojom::AccessibilityHelperHost overrides.
+  void OnAccessibilityEvent(
+      mojom::AccessibilityEventType event_type,
+      mojom::AccessibilityNodeInfoDataPtr event_source) override;
+
+ private:
+  mojo::Binding<mojom::AccessibilityHelperHost> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(ArcAccessibilityHelperBridge);
+};
+
+}  // namespace arc
+
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_ACCESSIBILITY_ARC_ACCESSIBILITY_HELPER_BRIDGE_H_