Enforce utf-8 codec on all files read and write.

Enforce utf-8 codec on all files read and write.

Otherwise, the files are opened in 'whatever happens to be the current encoding'
which is highly system-dependent. Even if some files are not encoded with utf-8,
the status quo is even worse. So it's worth trying out.

TBR=cmp@chromium.org
BUG=
TEST=


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=145306

[commit-bot: I haz the power, 2012-07-03 16:05:30]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/maruel@chromium.org/10697036/1

[commit-bot: I haz the power, 2012-07-03 16:08:16]

Change committed as 145306

[cmp, 2012-07-09 23:34:25]

lgtm (but if i recall correctly, this change ends up getting reverted later)