KT-10667 Fix building qualified references to nested type of built-ins, e.g. Map.Entry

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/NestedTypesTest.java

@@ -66,6 +66,10 @@ public class NestedTypesTest extends SingleFileTranslationTest {
         checkFooBoxIsOk();
     }
 
+    public void testInheritanceFromNestedBuiltIn() throws Exception {
+        checkFooBoxIsOk();
+    }
+
     @NotNull
     @Override
     protected List<String> additionalJsFiles(@NotNull EcmaVersion ecmaVersion) {

js/js.translator/src/org/jetbrains/kotlin/js/translate/context/StaticContext.java

@@ -553,7 +553,7 @@ public final class StaticContext {
                         return null;
                     }
 
-                    if (isNativeObject(descriptor) || isBuiltin(descriptor)) {
+                    if (isNativeObject(descriptor)) {
                         return null;
                     }
                     ClassDescriptor cls = (ClassDescriptor) descriptor;

js/js.translator/testData/nestedTypes/cases/inheritanceFromNestedBuiltIn.kt

@@ -0,0 +1,16 @@
+package foo
+
+class EntryImplementor() : Map.Entry<String, String> {
+    override val key: String
+        get() = "foo"
+    override val value: String
+        get() = "bar"
+}
+
+fun box(): String {
+    val entry = EntryImplementor()
+    var stringResult = "${entry.key}${entry.value}"
+    if (stringResult != "foobar") return "failed1: $stringResult"
+
+    return "OK"
+}