Object.observe: generate change records for named properties.

src/v8natives.js

Index: src/v8natives.js
diff --git a/src/v8natives.js b/src/v8natives.js
index e2e642941e9e95fc882b2b024d2ff69812bdd631..2de76e96239ef88c0072b09b4d27b0a0f8484849 100644
--- a/src/v8natives.js
+++ b/src/v8natives.js
@@ -60,7 +60,7 @@ function InstallFunctions(object, attributes, functions) {
   %ToFastProperties(object);
 }
 
-// Prevents changes to the prototype of a built-infunction.
+// Prevents changes to the prototype of a built-in function.
 // The "prototype" property of the function object is made non-configurable,
 // and the prototype object is made non-extensible. The latter prevents
 // changing the __proto__ property.