Fix corner-case in heap size estimation.

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index f2f649b86610ec71ef58cbd04ea734fa09f47a1f..a05f93a8a800b4436b7e310bf8eb2af1e6a8db64 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -3633,6 +3633,7 @@ void MarkCompactCollector::SweepSpace(PagedSpace* space, SweeperType sweeper) {
           PrintF("Sweeping 0x%" V8PRIxPTR " released page.\n",
                  reinterpret_cast<intptr_t>(p));
         }
+        space->MarkPageForLazySweeping(p);

[Vyacheslav Egorov (Chromium), 2012/01/17 13:49:37]

this is pretty confusing. we are both marking it for lazy sweepign and releasing
it immediately.

maybe rename MarkPageForLazySweeping into something else?

[Michael Starzinger, 2012/01/17 14:09:39]

Done. As discussed offline we chose IncreaseUnsweptFreeBytes  (and the Decrease
counterpart) to be a suitable name here.

         space->ReleasePage(p);
         continue;
       }