Re: [heycam/webidl] Make interface prototype object creation imperative (#494)

TimothyGu commented on this pull request.



> -    1.  Otherwise, if |A| is declared to inherit from another
-        interface, then return the
-        [=interface prototype object=]
-        for the inherited interface.
-    1.  Otherwise, if |A| is declared with the [{{LegacyArrayClass}}]
-        extended attribute, then return {{%ArrayPrototype%}}.
-    1.  Otherwise, return {{%ObjectPrototype%}}.
+    1.  Let |proto| be null.
+    1.  If |interface| is declared with the [{{Global}}] [=extended attribute=],
+        and |interface| [=support named properties|supports named properties=],
+        then set |proto| to the [=named properties object=] of |interface|,
+        as defined in [[#named-properties-object]].
+    1.  Otherwise, if |interface| is declared to inherit from another interface,
+        then set |proto| to the [=interface prototype object=] of the inherited interface.
+    1.  Otherwise, if |interface| is declared with the [{{LegacyArrayClass}}] [=extended attribute=],
+        then set |proto| to |realm|.\[[Intrinsics]].\[[{{%ArrayPrototype%}}]].

This becomes rendered as "<var>realm</var>.[[Intrinsics]].\[[%ArrayPrototype%]]"

> +    1.  Let |proto| be null.
+    1.  If |interface| is declared with the [{{Global}}] [=extended attribute=],
+        and |interface| [=support named properties|supports named properties=],
+        then set |proto| to the [=named properties object=] of |interface|,
+        as defined in [[#named-properties-object]].
+    1.  Otherwise, if |interface| is declared to inherit from another interface,
+        then set |proto| to the [=interface prototype object=] of the inherited interface.
+    1.  Otherwise, if |interface| is declared with the [{{LegacyArrayClass}}] [=extended attribute=],
+        then set |proto| to |realm|.\[[Intrinsics]].\[[{{%ArrayPrototype%}}]].
+    1.  Otherwise, set |proto| to |realm|.\[[Intrinsics]].\[[{{%ObjectPrototype%}}]].
+    1.  Let |interfaceProtoObj| be [=!=] <a abstract-op>ObjectCreate</a>(|proto|).
+    1.  Let |unscopableObject| be null.
+    1.  If |interface| has any [=member=] declared with the [{{Unscopable}}] [=extended attribute=],
+        then:
+        1.  Set |unscopableObject| to be [=!=]
+            <a abstract-op>ObjectCreate</a>({{%ObjectPrototype%}} of |realm|).

Still needs conversion.

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