Fix imports within the analyzer package

pkg/analyzer/test/src/task/strong/strong_test_helper.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.
 
 // TODO(jmesserly): this file needs to be refactored, it's a port from
 // package:dev_compiler's tests
 library analyzer.test.src.task.strong.strong_test_helper;
 
+import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/context/context.dart' show SdkAnalysisContext;
 import 'package:analyzer/src/generated/ast.dart';
-import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/type_system.dart';
 import 'package:analyzer/src/task/strong/checker.dart';
 import 'package:logging/logging.dart';
 import 'package:source_span/source_span.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 209 matching lines @@
       new MockDartSdk(mockSdkSources, reportMissing: true).resolver,
       uriResolver
     ]);
 
     // Run the checker on /main.dart.
     Source mainSource = uriResolver.resolveAbsolute(new Uri.file('/main.dart'));
     var initialLibrary =
         context.resolveCompilationUnit2(mainSource, mainSource);
 
     var collector = new _ErrorCollector();
-    var checker = new CodeChecker(context.typeProvider,
-        new StrongTypeSystemImpl(), collector,
+    var checker = new CodeChecker(
+        context.typeProvider, new StrongTypeSystemImpl(), collector,
         hints: true);
 
     // Extract expectations from the comments in the test files, and
     // check that all errors we emit are included in the expected map.
     var allLibraries = reachableLibraries(initialLibrary.element.library);
     for (var lib in allLibraries) {
       for (var unit in lib.units) {
         var errors = <AnalysisError>[];
         collector.errors = errors;
 
@@ skipping 259 matching lines @@
   UriKind get uriKind => UriKind.DART_URI;
 
   bool exists() => true;
 
   Source resolveRelative(Uri relativeUri) =>
       throw new UnsupportedError('not expecting relative urls in dart: mocks');
 
   Uri resolveRelativeUri(Uri relativeUri) =>
       throw new UnsupportedError('not expecting relative urls in dart: mocks');
 }