Update expectations for instance creations to match front_end.

pkg/analyzer/test/src/task/strong/front_end_inference_test.dart

Index: pkg/analyzer/test/src/task/strong/front_end_inference_test.dart
diff --git a/pkg/analyzer/test/src/task/strong/front_end_inference_test.dart b/pkg/analyzer/test/src/task/strong/front_end_inference_test.dart
index bf778e8bee38bc5c7d42f7650ab26ef7986dd15d..9d0f983d486a6015f235f3b3f1e93a05e7620879 100644
--- a/pkg/analyzer/test/src/task/strong/front_end_inference_test.dart
+++ b/pkg/analyzer/test/src/task/strong/front_end_inference_test.dart
@@ -32,6 +32,9 @@ main() {
   }, timeout: new Timeout(const Duration(seconds: 60)));
 }
 
+/// Set this to `true` to cause expectation comments to be updated.
+const bool fixProblems = false;
+
 @reflectiveTest
 class RunFrontEndInferenceTest {
   test_run() async {
@@ -99,7 +102,12 @@ class _FrontEndInferenceTest extends BaseAnalysisDriverTest {
     validation.finish();
 
     if (validation.hasProblems) {
-      return validation.problemsAsString;
+      if (fixProblems) {
+        validation.fixSource(uri);
+        return null;
+      } else {
+        return validation.problemsAsString;
+      }
     } else {
       return null;
     }
@@ -239,7 +247,7 @@ class _InstrumentationVisitor extends RecursiveAstVisitor<Null> {
     if (type is InterfaceType) {
       if (type.typeParameters.isNotEmpty &&
           node.constructorName.type.typeArguments == null) {
-        _recordTypeArguments(node.offset, type.typeArguments);
+        _recordTypeArguments(node.constructorName.offset, type.typeArguments);
       }
     }
   }