Simplify Hydrogen code stubs with variable argument count

Simplify behavior of code stubs that accept a variable number of stack
arguments in addition to their parameters. Before, we'd add a special
variable to the environment with the value of a register with the
number of arguments. Now, that register just appears as a parameter to
the code stub.

BUG=
R=verwaest@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=17680

[mvstanton, 2013-11-12 15:33:20]

Hi Toon, Danno, PTAL,
--Michael

[Toon Verwaest, 2013-11-12 15:43:05]

https://codereview.chromium.org/70203002/diff/30001/src/deoptimizer.cc
File src/deoptimizer.cc (left):

https://codereview.chromium.org/70203002/diff/30001/src/deoptimizer.cc#oldcod...
src/deoptimizer.cc:1548: TRANSLATED_VALUE_IS_NATIVE);
Now we can get rid of TRANSLATED_VALUE_IS_NATIVE I think.

[mvstanton, 2013-11-12 15:51:27]

Thx, updated.

[Toon Verwaest, 2013-11-12 15:53:37]

lgtm

[mvstanton, 2013-11-13 10:07:16]

Committed patchset #5 manually as r17680 (presubmit successful).