Do not dereference handles during relocation.

Do not dereference handles during relocation.

R=hpayer@chromium.org
BUG=

Committed: https://code.google.com/p/v8/source/detail?r=14445

[Hannes Payer (out of office), 2013-04-26 07:27:47]

LGTM, with two nits

https://codereview.chromium.org/13982023/diff/1/src/heap.h
File src/heap.h (right):

https://codereview.chromium.org/13982023/diff/1/src/heap.h#newcode1868
src/heap.h:1868: heap_->relocation_mutex_locked_by_optimizer_thread_ = false;
Just set it to false if the destructor is called by the optimizing compiler
thread.

https://codereview.chromium.org/13982023/diff/1/src/heap.h#newcode1875
src/heap.h:1875: static bool IsLockedByOptimizerThread(Heap* heap) {
I think you may want to avoid static methods since there may be multiple
optimizing compiler threads per process.

[Yang, 2013-04-26 07:35:15]

Committed patchset #1 manually as r14445 (presubmit successful).