GN: Make wtf_unittests build on mac/clang

GN: Make wtf_unittests build on mac/clang

On clang we enable -Wglobal-constructors which bans static initializers. This
is correct for all targets except unit test binaries, which need static initializers
since that's how the gtest TEST{,_F,_P} family of macros work. This splits that
warning into a separate config and avoids adding it to the unit test targets.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=175424

[jamesr, 2014-06-03 20:58:26]

brettw@ for review

eseidel@ for OWNERS on Source/BUILD.gn

With this wtf_unittests builds and runs on mac,
//third_party/WebKit/Source/platform compiles and fails to link with
libjpeg_turbo symbols (needs some yasm hookup)

[brettw, 2014-06-03 21:14:03]

https://codereview.chromium.org/318503002/diff/1/Source/BUILD.gn
File Source/BUILD.gn (right):

https://codereview.chromium.org/318503002/diff/1/Source/BUILD.gn#newcode72
Source/BUILD.gn:72: # The follow configs apply to all targets except for unit
tests, which rely on static
80 cols

https://codereview.chromium.org/318503002/diff/1/Source/wtf/BUILD.gn
File Source/wtf/BUILD.gn (right):

https://codereview.chromium.org/318503002/diff/1/Source/wtf/BUILD.gn#newcode116
Source/wtf/BUILD.gn:116: if (!is_mac) {
Why do you need this condition? Does the allocator not work on Mac?

[eseidel, 2014-06-03 21:17:44]

rslgtm

[jamesr, 2014-06-03 21:34:21]

The CQ bit was checked by jamesr@chromium.org

[commit-bot: I haz the power, 2014-06-03 21:35:02]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jamesr@chromium.org/318503002/20001

[commit-bot: I haz the power, 2014-06-03 23:39:36]

The CQ bit was unchecked by commit-bot@chromium.org

[jamesr, 2014-06-03 23:49:14]

The CQ bit was checked by jamesr@chromium.org

[commit-bot: I haz the power, 2014-06-03 23:49:36]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jamesr@chromium.org/318503002/40001

[commit-bot: I haz the power, 2014-06-04 02:01:39]

Change committed as 175424