Remove Compiler.commonElements

tests/compiler/dart2js/expect_annotations_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
 import 'package:compiler/src/compiler.dart';
 import 'package:compiler/src/elements/elements.dart';
 import 'package:compiler/src/js_backend/js_backend.dart';
 import 'package:compiler/src/types/types.dart';
@@ skipping 38 matching lines @@
 
 main() {
   asyncTest(() async {
     CompilationResult result =
         await runCompiler(memorySourceFiles: MEMORY_SOURCE_FILES);
     Compiler compiler = result.compiler;
     ClosedWorld closedWorld =
         compiler.resolutionWorldBuilder.closedWorldForTesting;
     Expect.isFalse(compiler.compilationFailed, 'Unsuccessful compilation');
     JavaScriptBackend backend = compiler.backend;
-    Expect.isNotNull(compiler.commonElements.expectNoInlineClass,
+    Expect.isNotNull(closedWorld.commonElements.expectNoInlineClass,
         'NoInlineClass is unresolved.');
-    Expect.isNotNull(compiler.commonElements.expectTrustTypeAnnotationsClass,
+    Expect.isNotNull(closedWorld.commonElements.expectTrustTypeAnnotationsClass,
         'TrustTypeAnnotations is unresolved.');
-    Expect.isNotNull(compiler.commonElements.expectAssumeDynamicClass,
+    Expect.isNotNull(closedWorld.commonElements.expectAssumeDynamicClass,
         'AssumeDynamicClass is unresolved.');
 
     void testTypeMatch(FunctionElement function, TypeMask expectedParameterType,
         TypeMask expectedReturnType, TypesInferrer inferrer) {
       for (ParameterElement parameter in function.parameters) {
         TypeMask type = inferrer.getTypeOfElement(parameter);
         Expect.equals(
             expectedParameterType, simplify(type, closedWorld), "$parameter");
       }
       if (expectedReturnType != null) {
@@ skipping 46 matching lines @@
         expectNoInline: true,
         expectTrustTypeAnnotations: true,
         expectedParameterType: jsStringType,
         expectedReturnType: jsIntType);
     test('methodAssumeDynamicTrustTypeAnnotations',
         expectAssumeDynamic: true,
         expectTrustTypeAnnotations: true,
         expectedParameterType: coreStringType);
   });
 }