Revert "Remove v8::AssertNoGCScope patch"
Revert "Remove v8::AssertNoGCScope patch"

We need this for Chrome 29, as predicted. See
ed6d9c62eb5411650964ea58211a2b27e504f35f for the original explanation.

This reverts commit 4751a1bbac76dedca9dd643e2d85a6ecb0df6b35.

electron/libchromiumcontent,paulcbetts/libchromiumcontent,zhanggyb/libchromiumcontent,brave/libchromiumcontent,hokein/libchromiumcontent,electron/libchromiumcontent,adamjgray/libchromiumcontent,paulcbetts/libchromiumcontent,hokein/libchromiumcontent,synaptek/libchromiumcontent,synaptek/libchromiumcontent,jlord/libchromiumcontent,jlord/libchromiumcontent,eric-seekas/libchromiumcontent,deepak1556/libchromiumcontent,bbondy/libchromiumcontent,brave/libchromiumcontent,eric-seekas/libchromiumcontent,deepak1556/libchromiumcontent,bbondy/libchromiumcontent,adamjgray/libchromiumcontent,atom/libchromiumcontent,atom/libchromiumcontent,zhanggyb/libchromiumcontent