fix #26962, invoking a known lambda is not a dynamic invoke

pkg/analyzer/test/src/task/strong/inferred_type_test.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
 /// Tests for type inference.
 library analyzer.test.src.task.strong.inferred_type_test;
 
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 3888 matching lines @@
 class C {
   C(_);
   int i;
 }
 ''');
     // No type should be inferred for a because there is a circular reference
     // between a and c.
   }
 
   void test_unsafeBlockClosureInference_closureCall() {
-    // Note: this is a DYNAMIC_INVOKE due to dartbug.com/26962.
+    // Regression test for https://github.com/dart-lang/sdk/issues/26962
     var mainUnit = checkFile('''
-var v = /*info:DYNAMIC_INVOKE*/((x) => 1.0)(
-  /*info:INFERRED_TYPE_CLOSURE*/() { return 1; });
+var v = ((x) => 1.0)(/*info:INFERRED_TYPE_CLOSURE*/() { return 1; });
 ''');
     var v = mainUnit.topLevelVariables[0];
     expect(v.name, 'v');
     expect(v.type.toString(), 'double');
   }
 
   void test_unsafeBlockClosureInference_constructorCall_explicitDynamicParam() {
     var mainUnit = checkFile('''
 class C<T> {
   C(T x());
@@ skipping 145 matching lines @@
     var mainUnit = checkFile('''
 double f(x) => 1.0;
 var v = f(/*info:INFERRED_TYPE_CLOSURE*/() { return 1; });
 ''');
     var v = mainUnit.topLevelVariables[0];
     expect(v.name, 'v');
     expect(v.type.toString(), 'double');
   }
 
   void test_unsafeBlockClosureInference_functionCall_noTypeParam_viaExpr() {
-    // TODO(paulberry): why is the call to f() considered a DYNAMIC_INVOKE?
     var mainUnit = checkFile('''
 double f(x) => 1.0;
-var v = /*info:DYNAMIC_INVOKE*/(f)(
-  /*info:INFERRED_TYPE_CLOSURE*/() { return 1; });
+var v = (f)(/*info:INFERRED_TYPE_CLOSURE*/() { return 1; });
 ''');
     var v = mainUnit.topLevelVariables[0];
     expect(v.name, 'v');
     expect(v.type.toString(), 'double');
   }
 
   void test_unsafeBlockClosureInference_inList_dynamic() {
     var mainUnit = checkFile('''
 var v = <dynamic>[/*info:INFERRED_TYPE_CLOSURE*/() { return 1; }];
 ''');
@@ skipping 136 matching lines @@
   }
 
   /// Adds a file using [helper.addFile] and calls [helper.check].
   ///
   /// Also returns the resolved compilation unit.
   @override
   CompilationUnitElement checkFile(String content) {
     return helper.checkFile(content).element;
   }
 }