Use worst-fit allocation in old space for prentured objects.

test/cctest/test-spaces.cc

Index: test/cctest/test-spaces.cc
diff --git a/test/cctest/test-spaces.cc b/test/cctest/test-spaces.cc
index 1f362d7e7afe71346fcb6f9cc76c5be0c05987d0..b7fe3c8b9e80fee89b9d892cf70abef799a4358b 100644
--- a/test/cctest/test-spaces.cc
+++ b/test/cctest/test-spaces.cc
@@ -363,7 +363,8 @@ TEST(OldSpace) {
   CHECK(s->SetUp());
 
   while (s->Available() > 0) {
-    s->AllocateRaw(Page::kMaxNonCodeHeapObjectSize)->ToObjectUnchecked();
+    s->AllocateRaw<FreeList::BEST_FIT>(Page::kMaxNonCodeHeapObjectSize)->
+        ToObjectUnchecked();
   }
 
   s->TearDown();