Gardening M39 : Fix compilation on Android + Linux

- Debugging delegate is now slipt with DevToolsManagerDelegate and
  DevToolsHttpHandlerDelegate.
- Removed overlay full screen related stuff (switch was removed)
- Adapt to API changes
Merge pull request #2471 from darktears/next

Gardening M39 : Fix compilation after https://codereview.chromium.org/56...