Merge base unit tests into src to be in line with Chrome.

Merge base unit tests into src to be in line with Chrome.

We still need the test/base-unittests folder until the test driver is
updated to handle unittests without the boilerplate.

TEST=base-unittests
R=svenpanne@chromium.org
BUG=v8:3489
LOG=n

Committed: https://code.google.com/p/v8/source/detail?r=23516

[Benedikt Meurer, 2014-08-29 10:44:54]

Jochen, Michi, Danno: FYI

[Sven Panne, 2014-08-29 10:52:41]

lgtm

[Benedikt Meurer, 2014-08-29 10:53:40]

Committed patchset #1 manually as 23516 (presubmit successful).

[tfarina, 2014-08-29 15:05:38]

Thanks for considering doing this way Benedikt!

https://codereview.chromium.org/520503004/diff/1/src/base/base.gyp
File src/base/base.gyp (right):

https://codereview.chromium.org/520503004/diff/1/src/base/base.gyp#newcode1
src/base/base.gyp:1: # Copyright 2014 the V8 project authors. All rights
reserved.
could you name this gyp file base_tests.gyp?

For similar files in Chromium, see cc/cc_tests.gyp, ui/base/ui_base_tests.gyp,
ui/gfx/gfx_tests.gyp among others.