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

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 46548742f7fd9c2f528090b47c2dd9f35d4b5b8e..7bb9e4a3d99f1d0da8d74c55d6f539dc277a10b7 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -111,6 +111,7 @@ class MediaDelegate;
 class MouseCursorEventFilter;
 class MruWindowTracker;
 class NewWindowDelegate;
+class OpenWithMenuController;
 class OverlayEventFilter;
 class PartialMagnificationController;
 class PartialScreenshotController;
@@ -354,6 +355,9 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
   DesktopBackgroundController* desktop_background_controller() {
     return desktop_background_controller_.get();
   }
+  OpenWithMenuController* open_with_menu_controller() {
+    return open_with_menu_controller_.get();
+  }
   PowerButtonController* power_button_controller() {
     return power_button_controller_.get();
   }
@@ -670,6 +674,7 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
   std::unique_ptr<::wm::WindowModalityController> window_modality_controller_;
   std::unique_ptr<views::corewm::TooltipController> tooltip_controller_;
   std::unique_ptr<DesktopBackgroundController> desktop_background_controller_;
+  std::unique_ptr<OpenWithMenuController> open_with_menu_controller_;
   std::unique_ptr<PowerButtonController> power_button_controller_;
   std::unique_ptr<LockStateController> lock_state_controller_;
   std::unique_ptr<MruWindowTracker> mru_window_tracker_;