Turn off allocation site info for crankshafted array constructor calls.

Turn off allocation site info for crankshafted array constructor calls.

Once we crankshaft a method, we should turn off allocation site info for 
constructed arrays. Additionally, the semantics for doing this were 
awkward because the constructed array code stubs get an 
AllocationSiteMode as a minor key, but it's used as a permission to 
determine the final mode locally based on ElementsKind. I refactored 
this to a simpler boolean for override or local control.

BUG=
R=hpayer@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=14934

[mvstanton, 2013-06-04 11:32:04]

Hi Hannes, here is the code we discussed, thanks!
--Michael

[Hannes Payer (out of office), 2013-06-04 12:25:54]

LGTM! Renaming nits.

https://codereview.chromium.org/16206007/diff/1/src/code-stubs.h
File src/code-stubs.h (right):

https://codereview.chromium.org/16206007/diff/1/src/code-stubs.h#newcode1701
src/code-stubs.h:1701: bool disable_allocation_sites() const {
This is not a real getter. The function name should be CamelCase. Moreover it
should start with Is*.

https://codereview.chromium.org/16206007/diff/1/src/code-stubs.h#newcode1717
src/code-stubs.h:1717: class DisableAllocationSitesBits: public BitField<bool,
8, 1> {};
Do you want to rename it to DisableAllocationSitesBit, since it is just one bit
referring to an allocation site?

[mvstanton, 2013-06-04 12:49:01]

Committed patchset #1 manually as r14934 (presubmit successful).