Cleanup Semaphore class.

Cleanup Semaphore class.

Drop the previous Semaphore class from platform files.

Add new Semaphore class using the new TimeDelta class for
the WaitFor() operation. Consistently assert correct behaviour
for the different implementations.

Improve test coverage of the Semaphore class.

R=mstarzinger@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=16473

[Benedikt Meurer, 2013-08-30 14:37:44]

Same for Semaphore, PTAL

[Michael Starzinger, 2013-09-02 09:04:35]

Latest patch-set is busted. Can you upload it again?

[Benedikt Meurer, 2013-09-02 09:07:43]

On 2013/09/02 09:04:35, Michael Starzinger wrote:
> Latest patch-set is busted. Can you upload it again?

Done.

[Michael Starzinger, 2013-09-02 11:45:31]

LGTM.

https://codereview.chromium.org/23748003/diff/24001/test/cctest/test-semaphor...
File test/cctest/test-semaphore.cc (right):

https://codereview.chromium.org/23748003/diff/24001/test/cctest/test-semaphor...
test/cctest/test-semaphore.cc:28: // Tests of the TokenLock class from lock.h
nit: This comment seems outdated, let's drop it.

[Benedikt Meurer, 2013-09-02 12:04:31]

https://codereview.chromium.org/23748003/diff/24001/test/cctest/test-semaphor...
File test/cctest/test-semaphore.cc (right):

https://codereview.chromium.org/23748003/diff/24001/test/cctest/test-semaphor...
test/cctest/test-semaphore.cc:28: // Tests of the TokenLock class from lock.h
On 2013/09/02 11:45:31, Michael Starzinger wrote:
> nit: This comment seems outdated, let's drop it.

Done.

[Benedikt Meurer, 2013-09-02 12:26:48]

Committed patchset #8 manually as r16473 (presubmit successful).