Merge pull request #2468 from darktears/next

Gardening M39 : First round of buildfixes.
Gardening M39 : Roll out 39.0.2171.2
Garderning M39 : Roll out new history

Modified Murphy patch to GYP on linux.
Gardening M39 : Linux build fixes.
Garderning M39 : Sync gyp_xwalk with gyp_chromium 9610607d5adf4afd2ad821c94434cd749041268a
Gardening M39 : Fix Android gyp.
Gardening M39 : Bump crosswalk version to 39.
Gardening M39 : Fix compilation after https://codereview.chromium.org/560323005

Debugging delegate is now slipt with DevToolsManagerDelegate and
DevToolsHttpHandlerDelegate.