[element model] migrate linter_context_impl_test

Change-Id: I7b64772066cb37025b8f1696923fa3e431126702
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/396628
Commit-Queue: Konstantin Shcheglov <[email protected]>
Auto-Submit: Phil Quitslund <[email protected]>
Reviewed-by: Konstantin Shcheglov <[email protected]>

Author: pq

pkg/analyzer/analyzer_use_new_elements.txt

@@ -225,7 +225,6 @@ test/src/dart/resolution/resolution.dart
 test/src/dart/resolution/scope_test.dart
 test/src/dart/resolution/super_formal_parameter_test.dart
 test/src/lint/lint_rule_test.dart
-test/src/lint/linter/linter_context_impl_test.dart
 test/src/services/top_level_declarations_test.dart
 test/src/summary/element_text.dart
 test/src/summary/elements/class_test.dart

pkg/analyzer/test/src/lint/linter/linter_context_impl_test.dart

@@ -42,9 +42,9 @@ abstract class AbstractLinterContextTest extends PubPackageResolutionTest {
       unit: result.unit,
     );
 
-    var libraryElement = result.libraryElement;
+    var libraryElement = result.libraryElement2;
     var analysisContext = libraryElement.session.analysisContext;
-    var libraryPath = libraryElement.source.fullName;
+    var libraryPath = libraryElement.firstFragment.source.fullName;
     var workspace = analysisContext.contextRoot.workspace;
     var workspacePackage = workspace.findPackageFor(libraryPath);