update to latest chromium
previous rebase work from Cheng
rebase fix
use v8 proxy resolver

Fix #318
[rebase] fix devtools
Update to newest Chromium upstream.

Conflicts:
	src/nw_package.cc
[Mac] Update to newest Chromium upstream.
rebase fix
[rebase] fix devtools
use v8 proxy resolver

Fix #318
Merge branch 'rebase'

Conflicts:
	src/nw_package.cc
Merge branch 'master' into issue251
[API][GTK] Implement SetShowInTaskbar in GTK. Part #251