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

test/cctest/test-spaces.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 345 matching lines @@
 
   OldSpace* s = new OldSpace(heap,
                              heap->MaxOldGenerationSize(),
                              OLD_POINTER_SPACE,
                              NOT_EXECUTABLE);
   CHECK(s != NULL);
 
   CHECK(s->SetUp());
 
   while (s->Available() > 0) {
-    s->AllocateRaw(Page::kMaxNonCodeHeapObjectSize)->ToObjectUnchecked();
+    s->AllocateRaw<FreeList::BEST_FIT>(Page::kMaxNonCodeHeapObjectSize)->
+        ToObjectUnchecked();
   }
 
   s->TearDown();
   delete s;
   memory_allocator->TearDown();
   delete memory_allocator;
 }
 
 
 TEST(LargeObjectSpace) {
@@ skipping 20 matching lines @@
     { MaybeObject* maybe_obj = lo->AllocateRaw(lo_size, NOT_EXECUTABLE);
       if (!maybe_obj->ToObject(&obj)) break;
     }
     CHECK(lo->Available() < available);
   };
 
   CHECK(!lo->IsEmpty());
 
   CHECK(lo->AllocateRaw(lo_size, NOT_EXECUTABLE)->IsFailure());
 }