[WIP Prototype] ES6 https://html.spec.whatwg.org/#fetch-a-single-module-script implementation

third_party/WebKit/LayoutTests/external/wpt/html/semantics/scripting-1/the-script-element/module/imports.noinline-b.js

+
+        import { B as B_RENAMED } from "./imports-b.js";
+
+        test(function () {
+            assert_equals(B_RENAMED.from, "imports-b.js", "Unexpected B_RENAMED");
+
+            try
+            {
+                B;
+                assert_unreached("Unexpectedly defined B");
+            }
+            catch (ex)
+            {}
+        }, "Import a simple module, renamed");
+