Remove the gyp build.  The .gypi files were not renamed so that diff and
rebase would work on this change.  They will be renamed in a separate
change.

BUG=angleproject:1569

Change-Id: If8a217027633293664b820104f91a4ca5889b24e
Reviewed-on: https://chromium-review.googlesource.com/1187380
Commit-Queue: Frank Henigman <fjhenigman@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>