Generalize HeapObject alignment requirements.

src/snapshot/serialize.cc

Index: src/snapshot/serialize.cc
diff --git a/src/snapshot/serialize.cc b/src/snapshot/serialize.cc
index b311f9dcda065c2c3b1f8dad3bfafe383e7f2a92..eaebd68e5d78970e888ac75867fa555f98137158 100644
--- a/src/snapshot/serialize.cc
+++ b/src/snapshot/serialize.cc
@@ -1729,7 +1729,8 @@ void Serializer::ObjectSerializer::SerializePrologue(AllocationSpace space,
     back_reference = serializer_->AllocateLargeObject(size);
   } else {
     bool needs_double_align = false;
-    if (object_->NeedsToEnsureDoubleAlignment()) {
+    // TODO(bbudge) Generalize to other alignment constraints.

[Hannes Payer (out of office), 2015/05/21 09:53:31]

TODO(bbudge): ...

[bbudge, 2015/05/21 10:02:08]

Done.

+    if (object_->RequiredAlignment() == kDoubleAligned) {
       // Add wriggle room for double alignment padding.
       back_reference = serializer_->Allocate(space, size + kPointerSize);
       needs_double_align = true;