Add arity checks to mjsunit's assertEquals and assertSame

Add arity checks to mjsunit's assertEquals and assertSame

BUG=None
LOG=n
R=mstarzinger@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=21748

[arv (Not doing code reviews), 2014-06-03 00:40:58]

Fix typo

[arv (Not doing code reviews), 2014-06-03 00:41:43]

PTAL

[arv (Not doing code reviews), 2014-06-03 01:13:10]

Add test

[arv (Not doing code reviews), 2014-06-09 21:50:17]

PTAL

[Michael Starzinger, 2014-06-10 11:59:37]

Somehow it feels like overkill to have a test case for the sanity check in the
test methods that our JS tests are using. Somewhere along level 3 or 4 of this
testing "inception" I got lost. So if you feel that this improves usability of
our mjsunit test suite, I am fine with it. I would also be fine with scrapping
the entire mjsunit-test.js file and just have the arity check. WDYT?

[Michael Starzinger, 2014-06-10 12:05:19]

LGTM (independent of how my previous comment is addressed).

[arv (Not doing code reviews), 2014-06-10 14:37:32]

On 2014/06/10 12:05:19, Michael Starzinger wrote:
> LGTM (independent of how my previous comment is addressed).

I'll remove the test. (it was useful for validating the bug fix but now that it
works it just adds noise)

[arv (Not doing code reviews), 2014-06-10 14:43:33]

Remove test

[arv (Not doing code reviews), 2014-06-10 14:44:11]

Uploaded new patch. Can you commit this for me when you have the time?

[Michael Starzinger, 2014-06-10 15:19:41]

Committed patchset #4 manually as r21748 (presubmit successful).