Remove NearLabel, replacing remaining occurrences with Label

Remove NearLabel, replacing remaining occurrences with Label

TEST=compiles, existing tests pass

Committed: http://code.google.com/p/v8/source/detail?r=7848

[Jakob Kummerow, 2011-05-10 16:09:37]

Here's a follow-up to what you reviewed earlier: completely remove the NearLabel
class.

This CL is smaller than it looks. The majority of changed lines comes from
moving method implementations from macro-assembler-x64.h to
macro-assembler-x64.cc, which was necessary because they're not templates any
more. All actual changes are pretty straightforward.

[danno, 2011-05-10 16:29:16]

LGTM, looks mechanically correct, although my eyeballs itch after looking at all
the mechanical changes.

[Mads Ager (chromium), 2011-05-11 05:58:31]

LGTM