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..ed596d6bc67490025d4571ebd167481ed587b250
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+++ b/ash/renderer_context_menu/open_with_menu_controller.h
@@ -0,0 +1,60 @@
+// 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 GURL;
+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 int PopulateOpenWithMenu(RenderViewContextMenuProxy* proxy,
+                                     int menu_id_start,
+                                     size_t num_menu_items,
+                                     const GURL& url) = 0;
+    virtual void ExecuteCommand(int id) = 0;
+    virtual void MenuClosed() = 0;
+  };
+
+  OpenWithMenuController();
+  void SetDelegate(Delegate* delegate);
+
+  // Populates "Open with <app>" context menu items for the |url| either
+  // synchronously or asynchronously. Returns the number of menu items that have
+  // to be enabled right away. When there is nothing to do for the |url|, the
+  // function immediately returns 0. The function adds up to |num_menu_items|
+  // context menu items starting from |menu_id_start| to the |proxy|.
+  int PopulateOpenWithMenu(RenderViewContextMenuProxy* proxy,
+                           int menu_id_start,
+                           size_t num_menu_items,
+                           const GURL& url);
+
+  // Notifies the controller that one of the items in the context menu is
+  // executed. This method can only be called after PopulateOpenWithMenu()
+  // is called and before MenuClosed() is called.
+  void ExecuteCommand(int id);
+
+  // Notifies the controller that the context menu is being closed.
+  void MenuClosed();
+
+ private:
+  Delegate* delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(OpenWithMenuController);
+};
+
+}  // namespace ash
+
+#endif  // ASH_RENDERER_CONTEXT_MENU_OPEN_WITH_MENU_CONTROLLER_H_