Merged r15047, r15048, r15049 into trunk branch.

Merged r15047, r15048, r15049 into trunk branch.

MIPS: add a default value for return value

MIPS: Fix LoadIC calling convention.

MIPS: Generator object "next" method takes optional send value.

BUG=v8:2355, v8:2715
R=jkummerow@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=15051

[Jakob Kummerow, 2013-06-10 19:23:23]

LGTM.

Note that you won't be able to create a Chromium roll CL just yet, as the
previous V8 roll is still in flight: https://codereview.chromium.org/16035017/
You'll have to wait for that to land, then update your Chromium checkout and
create a CL based on the updated DEPS file.

[palfia, 2013-06-10 19:35:13]

Committed manually as r15051 (presubmit successful).