Check in codegen test expectations.

test/codegen/expect/language/import_collection_no_prefix_test.js

Index: test/codegen/expect/language/import_collection_no_prefix_test.js
diff --git a/test/codegen/expect/language/import_collection_no_prefix_test.js b/test/codegen/expect/language/import_collection_no_prefix_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..f24196bd2e1b4ddf65d1f834a28190b54c5d991e
--- /dev/null
+++ b/test/codegen/expect/language/import_collection_no_prefix_test.js
@@ -0,0 +1,18 @@
+dart_library.library('language/import_collection_no_prefix_test', null, /* Imports */[
+  'dart_sdk'
+], function load__import_collection_no_prefix_test(exports, dart_sdk) {
+  'use strict';
+  const core = dart_sdk.core;
+  const collection = dart_sdk.collection;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const import_collection_no_prefix_test = Object.create(null);
+  let VoidTodynamic = () => (VoidTodynamic = dart.constFn(dart.definiteFunctionType(dart.dynamic, [])))();
+  import_collection_no_prefix_test.main = function() {
+    let e = new collection.SplayTreeMap();
+    core.print(dart.str`"dart:collection" imported, ${e} allocated`);
+  };
+  dart.fn(import_collection_no_prefix_test.main, VoidTodynamic());
+  // Exports:
+  exports.import_collection_no_prefix_test = import_collection_no_prefix_test;
+});