Merge r11075 from bleeding_edge to 3.8 branch: Revert dynamic frame alignment.

Merge r11075 from bleeding_edge to 3.8 branch: Revert dynamic frame alignment.

Marking aligned frames with a marker can produce false positives since
an optimized frame spill slot may be mistakenly seen as a marker value.

It also breaks the debugger reproducably: Tested when enabling alignment
for all functions and running the debugger unit tests.

BUG=v8:2009
TEST=no crashes in EarleyBoyer
Committed: https://code.google.com/p/v8/source/detail?r=11110

[danno, 2012-03-22 15:15:41]

lgtm