[turbofan] Add support for named access to Number primitives.

[turbofan] Add support for named access to Number primitives.

Implement the missing bits for named access to Number values, which is
basically always done on the Number prototype.  Crankshaft only deals
with Number primitives in the polymorphic case, while we generally
support Numbers even for monomorphic access.

R=jarin@chromium.org
BUG=v8:4470
LOG=n

Committed: https://crrev.com/608ed2e24f928d38c65f1ce71b4aa35c6b17190c
Cr-Commit-Position: refs/heads/master@{#31731}

[Benedikt Meurer, 2015-11-03 06:33:45]

Hey Jaro,

Here's the fix for the "number stuff" TODO :-)
Please take a look.

Thanks,
Benedikt

[Jarin, 2015-11-03 06:37:53]

lgtm

[Benedikt Meurer, 2015-11-03 06:39:56]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2015-11-03 06:40:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1425293004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1425293004/1

[commit-bot: I haz the power, 2015-11-03 06:56:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-03 06:56:35]

Patchset 1 (id:??) landed as
https://crrev.com/608ed2e24f928d38c65f1ce71b4aa35c6b17190c
Cr-Commit-Position: refs/heads/master@{#31731}