Let test driver fail if test executable can't list the tests.

TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/605133004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24253 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Disable job-based sweeping in predictable mode.

BUG=v8:3563
LOG=N
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/604283002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24254 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Extend JSBuiltinReducer to cover Math.abs as well.

R=titzer@chromium.org
TEST=compiler-unittests/JSBuiltinReducerTest.MathAbs

Review URL: https://codereview.chromium.org/605123004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24255 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
initialize v8 early in unittests

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/608773002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24256 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'