Use the same registers for StoreIC and KeyedStoreIC.

Use the same registers for StoreIC and KeyedStoreIC.

Based on https://codereview.chromium.org/389283002 ("Use register parameters in ElementsTransitionGenerator") which must land first.

R=mstarzinger@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=22387

[mvstanton, 2014-07-14 11:03:11]

Hi Michael, here is an unchanged re-land of the CL you reviewed, it just
requires that the use of register parameters in ElementsTransitionGenerator
lands first. When you sign off on that, then you could rubber-stamp this one,
thanks,
--Michael

[Michael Starzinger, 2014-07-14 11:47:50]

LGTM (rubber-stamped, since it's only a reland).

[mvstanton, 2014-07-14 20:43:57]

Committed patchset #1 manually as r22387.