Use shorter DartElementLocation.

pkg/analyzer/test/generated/engine_test.dart

 // Copyright (c) 2014, 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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.engine_test;
 
 import 'dart:collection';
@@ skipping 587 matching lines @@
     TimestampedData<String> contents = _context.getContents(source);
     expect(contents.data.toString(), content);
   }
 
   void test_getDeclaredVariables() {
     _context = AnalysisContextFactory.contextWithCore();
     expect(_context.declaredVariables, isNotNull);
   }
 
   void test_getElement() {
-    _context = AnalysisContextFactory.contextWithCore();
-    _sourceFactory = _context.sourceFactory;
-    LibraryElement core =
-        _context.computeLibraryElement(_sourceFactory.forUri("dart:core"));
-    expect(core, isNotNull);
-    ClassElement classObject =
-        _findClass(core.definingCompilationUnit, "Object");
-    expect(classObject, isNotNull);
-    ElementLocation location = classObject.location;
+    Source source = _addSource('/test.dart', r'''
+class A {}
+class B {}
+class C {}
+''');
+    _analyzeAll_assertFinished();
+    LibraryElement library = _context.computeLibraryElement(source);
+    ClassElement classB = library.definingCompilationUnit.getType('B');
+    expect(classB, isNotNull);
+    ElementLocation location = classB.location;
     Element element = _context.getElement(location);
-    expect(element, same(classObject));
+    expect(element, same(classB));
   }
 
   void test_getElement_constructor_named() {
     Source source = _addSource("/lib.dart", r'''
 class A {
   A.named() {}
 }''');
     _analyzeAll_assertFinished();
     LibraryElement library = _context.computeLibraryElement(source);
     ClassElement classA = _findClass(library.definingCompilationUnit, "A");
@@ skipping 6586 matching lines @@
   bool contains(Source source) => source == libB;
 }
 
 
 class _UniversalCachePartitionTest_test_setMaxCacheSize implements
     CacheRetentionPolicy {
   @override
   RetentionPriority getAstPriority(Source source, SourceEntry sourceEntry) =>
       RetentionPriority.LOW;
 }