WebAPI Blocker for Chrome
More About WebAPI Blocker
Simply open toolbar popup UI and choose an API from the drop-down list. Then, click on the (+) button to add the item to the API list. By default, few items are added to the list. Once you add an item, you can remove it from the list by clicking on the "remove" button next to each item. Moreover, you can deactivate an item by removing the check-mark from the list. There is also a "reload" button at the top toolbar to reload the active tab.
Note #1: please be careful when you block (nullify) a web-API. Because certain APIs may cause websites to not fully load or even make them unresponsive. Therefore, please do enough research before disabling an API.
Note #2: in order to report bugs, please fill the bug report form in the addon's homepage (http://mybrowseraddon.com/webapi-blocker.html).