[ESNext] Implement DynamicImportCall

test/mjsunit/harmony/modules-import-3.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --harmony-dynamic-import
+
+var ran = false;
+async function foo () {
+    try {

[adamk, 2017/03/16 21:41:23]

Nit: two-space indent (now I know why you asked about clang-format...)

[gsathya, 2017/03/17 00:47:22]

Done.

+        let life = await import('modules-skip-2.js');
+        assertUnreachable();
+    } catch(e) {
+        assertEquals(e.message, '42 is not the answer');

[adamk, 2017/03/16 21:41:23]

Nit: order should be assertEquals(expected, actual)

[gsathya, 2017/03/17 00:47:22]

Done.

+        ran = true;
+    }
+}
+
+foo();
+
+%RunMicrotasks();
+
+assertTrue(ran);