[MediaGalleries] Context menu for Mac media galleries dialog.

chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa.h

Index: chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa.h
diff --git a/chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa.h b/chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa.h
index 439764fe414b1a7977e4ff25396792206f670375..8bccc282dacba3ae2a9e532a7b9abc40c4c961f9 100644
--- a/chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa.h
+++ b/chrome/browser/ui/cocoa/extensions/media_galleries_dialog_cocoa.h
@@ -17,6 +17,10 @@
 class MediaGalleriesDialogBrowserTest;
 class MediaGalleriesDialogTest;
 
+namespace ui {
+class MenuModel;
+}
+
 // This class displays an alert that can be used to grant permission for
 // extensions to access a gallery (media folders).
 class MediaGalleriesDialogCocoa : public ConstrainedWindowMacDelegate,
@@ -43,6 +47,8 @@ class MediaGalleriesDialogCocoa : public ConstrainedWindowMacDelegate,
   virtual void OnConstrainedWindowClosed(
       ConstrainedWindowMac* window) OVERRIDE;
 
+  ui::MenuModel* GetContextMenuModel(MediaGalleryPrefId prefid);
+
  private:
   FRIEND_TEST_ALL_PREFIXES(MediaGalleriesDialogBrowserTest, Close);
   FRIEND_TEST_ALL_PREFIXES(MediaGalleriesDialogTest, InitializeCheckboxes);