[typedarray] Really check that the JSTypedArray::length is always a Smi.

src/objects-debug.cc

Index: src/objects-debug.cc
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index b467ac607fd9907c579f1bcd1bbae0c0d742d13c..5902e0dda8cd6cc0ac47362849e6aa9a381f7a26 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -888,9 +888,7 @@ void JSTypedArray::JSTypedArrayVerify() {
   CHECK(IsJSTypedArray());
   JSArrayBufferViewVerify();
   VerifyPointer(raw_length());
-  CHECK(raw_length()->IsSmi() || raw_length()->IsHeapNumber() ||
-        raw_length()->IsUndefined(GetIsolate()));
-
+  CHECK(raw_length()->IsSmi() || raw_length()->IsUndefined(GetIsolate()));
   VerifyPointer(elements());
 }