Use shorter DartElementLocation.

pkg/analyzer/test/generated/engine_test.dart

Index: pkg/analyzer/test/generated/engine_test.dart
diff --git a/pkg/analyzer/test/generated/engine_test.dart b/pkg/analyzer/test/generated/engine_test.dart
index 04fc0d2c77002e8c223b0d0bb760255e5aad9e55..e81e8173cf50f2cc1570f15339c63856916b8030 100644
--- a/pkg/analyzer/test/generated/engine_test.dart
+++ b/pkg/analyzer/test/generated/engine_test.dart
@@ -605,17 +605,18 @@ main() {}''');
   }
 
   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() {