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

ash/renderer_context_menu/open_with_menu_controller.h

Index: ash/renderer_context_menu/open_with_menu_controller.h
diff --git a/ash/renderer_context_menu/open_with_menu_controller.h b/ash/renderer_context_menu/open_with_menu_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..aa734a38023c984fad097bdd4714c4bf12963656
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+++ b/ash/renderer_context_menu/open_with_menu_controller.h
@@ -0,0 +1,55 @@
+// 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_RENDERER_CONTEXT_MENU_OPEN_WITH_MENU_CONTROLLER_H_
+#define ASH_RENDERER_CONTEXT_MENU_OPEN_WITH_MENU_CONTROLLER_H_
+
+#include "ash/ash_export.h"
+#include "base/macros.h"
+
+class RenderViewContextMenuObserver;
+class RenderViewContextMenuProxy;
+
+namespace ash {
+
+// A class for populating and updating "Open with <app>" menu items in a
+// renderer context menu.
+class ASH_EXPORT OpenWithMenuController {
+ public:
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+    virtual RenderViewContextMenuObserver* CreateMenu(
+        RenderViewContextMenuProxy* proxy,
+        int menu_id_start,
+        size_t num_menu_items,
+        int sub_menu_id_start,
+        size_t num_sub_menu_items) = 0;
+  };
+
+  OpenWithMenuController();
+  void SetDelegate(Delegate* delegate);
+
+  // Returns a menu observer that populates "Open with <app>" context menu
+  // items. When such type of a menu is not supported, returns nullptr.
+  // The returned menu observer will add up to |num_menu_items| main context
+  // menu items starting from |menu_id_start| to the |proxy|. The object may
+  // also use up to |num_sub_menu_items| IDsstarting from |sub_menu_id_start|
+  // when a sub menu is needed. The caller takes ownership of the returned
+  // object.
+  RenderViewContextMenuObserver* CreateMenu(RenderViewContextMenuProxy* proxy,
+                                            int menu_id_start,
+                                            size_t num_menu_items,
+                                            int sub_menu_id_start,
+                                            size_t num_sub_menu_items);
+
+ private:
+  Delegate* delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(OpenWithMenuController);
+};
+
+}  // namespace ash
+
+#endif  // ASH_RENDERER_CONTEXT_MENU_OPEN_WITH_MENU_CONTROLLER_H_