External Array renaming and boilerplate scrapping

External Array renaming and boilerplate scrapping

Replaced symbolic names with correct JS name (byte -> int8, unsigned int -> uint32 etc).
Using macros to scrap the boilerplate
BUG=
R=svenpanne@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=18835

[Dmitry Lomov (no reviews), 2014-01-24 05:37:11]

Sven, PTAL - I hope you like it.

I had a long and boring flight, so I took the opportunity to clean up our
external array code a bit.
I haven't removed all of the boilerplate, but one has to stop somewhere (for
some things I have better ideas)

[Sven Panne, 2014-01-24 12:42:14]

LGTM with a nit

https://codereview.chromium.org/145133013/diff/80001/src/api.cc
File src/api.cc (right):

https://codereview.chromium.org/145133013/diff/80001/src/api.cc#newcode2377
src/api.cc:2377: if (!obj->IsJSTypedArray()) return false;                      
       \
Perhaps use '&&' here...

[Dmitry Lomov (no reviews), 2014-01-24 16:01:39]

Committed patchset #1 manually as r18835 (presubmit successful).