More OStreamsUse OStreams more often.

More OStreamsUse OStreams more often.

This is a mostly mechanical CL (more than 90% Emacs macros and
query-replace-regexp) moving FILE*/StringStream*-based APIs to
OStream-based APIs. There are a few places where this had to stop,
otherwise the CL would be even bigger, but this can easily and
incrementally cleaned up later.

R=bmeurer@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=22232

[Benedikt Meurer, 2014-07-07 09:06:43]

LGTM (rubber-stamped)

[Sven Panne, 2014-07-07 09:58:08]

Committed patchset #2 manually as r22232 (presubmit successful).