Yes, the new WebView in Android 4.4 is totally debuggable: https://developers.google.com/chrome-developer-tools/docs/re... It doesn't yet have the screencasting, but every other DevTools feature is in there.

trigger.io claim it is possible for their apps on Android 4.4 [1] that uses Chromium as basis for the webview, but I didn't have the chance yet as I am still on 4.3.

[1] http://trigger.io/cross-platform-application-development-blo...