- Electron version: v0.36.9
- Operating system: Windows 10/OS X

In #779 a `disposition` was added to the `new-window` event in [webContents](https://github.com/atom/electron/blob/master/docs/api/web-contents.md#event-new-window) but it always seems to be set to `new-window` when clicking on target="_blank" links in our web app wrapper: https://github.com/irccloud/irccloud-desktop/blob/v0.1.3/app/main.js#L109

If I Ctrl (Win) or Cmd (OS X) or middle click on links, I would expect to see a `background-tab` disposition, as in Chrome that will open links in a background tab, while keeping focus on the current tab. I'd like to catch this behaviour to set `activate` to false in `shell.openExternal`.

Is this possible?

atom/browser/api/atom_api_web_contents.h
return ++request_id_;
  }
  
  void OnCursorChange(const content::WebCursor& cursor);
  
  void OnRendererMessage(const base::string16& channel,
                         const base::ListValue& args);
  
  void OnRendererMessageSync(const base::string16& channel,
                             const base::ListValue& args,
                             IPC::Message* message);
  v8::Global<v8::Value> session_;
  v8::Global<v8::Value> devtools_web_contents_;
  v8::Global<v8::Value> debugger_;
  scoped_ptr<WebViewGuestDelegate> guest_delegate_;
  
  WebContents* embedder_;
  
  Type type_;
  
  uint32_t request_id_;
  DISALLOW_COPY_AND_ASSIGN(WebContents);
};
}  
}  
#endif