Support weak heap references in the ConstantPool to support IsWeakObjectInOptimizedCode objects.

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index 518167cc51e0d63216056f51b5508fdd94424b0e..362cf701a9fe1e69a6269f21d9b0844a45cb9db4 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -611,9 +611,12 @@ void ConstantPoolArray::ConstantPoolArrayPrint(FILE* out) {
     } else if (i < first_heap_ptr_index()) {
       PrintF(out, "\n  [%d]: code target pointer: %p", i,
              reinterpret_cast<void*>(get_code_ptr_entry(i)));
-    } else if (i < first_int32_index()) {
+    } else if (i < first_weak_ptr_index()) {
       PrintF(out, "\n  [%d]: heap pointer: %p", i,
              reinterpret_cast<void*>(get_heap_ptr_entry(i)));
+    } else if (i < first_int32_index()) {
+      PrintF(out, "\n  [%d]: weak heap pointer: %p", i,
+             reinterpret_cast<void*>(get_weak_ptr_entry(i)));
     } else {
       PrintF(out, "\n  [%d]: int32: %d", i, get_int32_entry(i));
     }