[adapter.js] is a shim to insulate apps from spec changes and prefix differences. In fact, the standards and protocols used for WebRTC implementations are highly stable, and there are only a few prefixed names. For full interop information, see webrtc.org/web-apis/interop.
bower install webrtc-adapternpm install webrtc-adapter-test<script src="bower_components/webrtc-adapter/adapter.js"></script>Copy to desired location in your src tree or use a minify/vulcanize tool (node_modules is usually not published with the code). See webrtc/samples repo as an example on how you can do this.
Detailed information on developing in the webrtc github repo can be found in the WebRTC GitHub repo developer's guide.
Head over to test/README.md and get started developing.