Harden some INLINE_OPTIMIZED runtime bultins.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 5afb690ee286115282df7ef94bac945e6dbb9c4e..f98db8f2caa2d42487f858209ecd3f9148262817 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -827,6 +827,9 @@ enum InstanceType {
   // Boundaries for testing the types for which typeof is "object".
   FIRST_NONCALLABLE_SPEC_OBJECT_TYPE = JS_PROXY_TYPE,
   LAST_NONCALLABLE_SPEC_OBJECT_TYPE = JS_REGEXP_TYPE,
+  // Boundaries for testing ArrayBufferViews.
+  FIRST_ARRAY_BUFFER_VIEW_TYPE = JS_TYPED_ARRAY_TYPE,
+  LAST_ARRAY_BUFFER_VIEW_TYPE = JS_DATA_VIEW_TYPE,
   // Note that the types for which typeof is "function" are not continuous.
   // Define this so that we can put assertions on discrete checks.
   NUM_OF_CALLABLE_SPEC_OBJECT_TYPES = 2