Add "Open with <ARC-app-name>" items to the context menu

ash/link_handler_model.h

+// Copyright 2016 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 ASH_LINK_HANDLER_MODEL_H_
+#define ASH_LINK_HANDLER_MODEL_H_
+
+#include <string>
+#include <vector>
+
+#include "ash/ash_export.h"
+#include "ui/gfx/image/image.h"
+
+class GURL;
+
+namespace ash {
+
+struct ASH_EXPORT LinkHandlerInfo {
+  std::string name;
+  gfx::Image icon;
+  uint32_t id;
+};
+
+// A model LinkHandlerModelFactory returns.
+class ASH_EXPORT LinkHandlerModel {
+ public:
+  class Observer {
+   public:
+    virtual ~Observer();
+    virtual void ModelChanged(const std::vector<LinkHandlerInfo>& handlers) = 0;
+  };
+
+  virtual ~LinkHandlerModel();
+  virtual void AddObserver(Observer* observer) = 0;
+
+  // Opens the |url| with a handler specified by the |handler_id|.
+  virtual void OpenLinkWithHandler(const GURL& url, uint32_t handler_id) = 0;
+};
+
+}  // namespace ash
+
+#endif  // ASH_LINK_HANDLER_MODEL_H_