Clear function breakpoints in Debug::HandleWeakDebugInfo callback.

Clear function breakpoints in Debug::HandleWeakDebugInfo callback.

When removing debug_info from SharedFunctionInfo, clear all breakpoints associated with that debug_info.
This is needed because function will live in heap until next gc, and therefore can be found
by Runtime::FindSharedFunctionInfoInScript.

Committed: http://code.google.com/p/v8/source/detail?r=4997

[Søren Thygesen Gjesse, 2010-06-30 11:52:23]

LGTM

http://codereview.chromium.org/2848032/diff/1/2
File src/debug.cc (right):

http://codereview.chromium.org/2848032/diff/1/2#newcode686
src/debug.cc:686: DebugInfoListNode* node =
reinterpret_cast<DebugInfoListNode*>(data);
Please add a comment on why this is required.

http://codereview.chromium.org/2848032/diff/1/3
File test/cctest/test-debug.cc (right):

http://codereview.chromium.org/2848032/diff/1/3#newcode2079
test/cctest/test-debug.cc:2079: // function which is already a garbage but is
not collected so far.
is already a garbage but is not collected so far-> has no references but has not
been collected yet