Implement modular compilation

test/codegen/expect/domtest.js

Index: test/codegen/expect/domtest.js
diff --git a/test/codegen/expect/domtest.js b/test/codegen/expect/domtest.js
deleted file mode 100644
index 466b6c9f35eff42668fd087e5bd9a9ad779d4026..0000000000000000000000000000000000000000
--- a/test/codegen/expect/domtest.js
+++ /dev/null
@@ -1,20 +0,0 @@
-dart_library.library('domtest', null, /* Imports */[
-  'dart/_runtime',
-  'sunflower/dom',
-  'dart/core'
-], /* Lazy imports */[
-], function(exports, dart, dom, core) {
-  'use strict';
-  let dartx = dart.dartx;
-  function testNativeIndexers() {
-    let nodes = dom.document.querySelector('body').childNodes;
-    for (let i = 0; i < dart.notNull(nodes.length); i++) {
-      let old = nodes[i];
-      nodes[i] = dom.document.createElement('div');
-      core.print(dart.equals(nodes[i], old));
-    }
-  }
-  dart.fn(testNativeIndexers);
-  // Exports:
-  exports.testNativeIndexers = testNativeIndexers;
-});