Merge arguments branch to bleeding edge (second try).

src/objects-printer.cc

Index: src/objects-printer.cc
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index dca500e793c0f48c803a8aff6fe754452a647f1e..158789e0da1f330e1291f28d77f227cd6358c6ad 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -351,6 +351,15 @@ void JSObject::PrintElements(FILE* out) {
     case DICTIONARY_ELEMENTS:
       elements()->Print(out);
       break;
+    case NON_STRICT_ARGUMENTS_ELEMENTS: {
+      FixedArray* p = FixedArray::cast(elements());
+      for (int i = 2; i < p->length(); i++) {
+        PrintF(out, "   %d: ", i);
+        p->get(i)->ShortPrint(out);
+        PrintF(out, "\n");
+      }
+      break;
+    }
     default:
       UNREACHABLE();
       break;