Handle more unqualified SendSets

tests/compiler/dart2js/semantic_visitor_test_send_data.dart

Index: tests/compiler/dart2js/semantic_visitor_test_send_data.dart
diff --git a/tests/compiler/dart2js/semantic_visitor_test_send_data.dart b/tests/compiler/dart2js/semantic_visitor_test_send_data.dart
index e5279f2076042bda337343b65c7b8731c5ef6974..dcd840ea45a0d1005b530316426c25c5ce0ed932 100644
--- a/tests/compiler/dart2js/semantic_visitor_test_send_data.dart
+++ b/tests/compiler/dart2js/semantic_visitor_test_send_data.dart
@@ -1531,10 +1531,17 @@ const Map<String, List<Test>> SEND_TESTS = const {
                     arguments: '(null,42)')),
     const Test(
         '''
+        m() => dynamic = 42;
+        ''',
+        const Visit(VisitKind.VISIT_DYNAMIC_TYPE_LITERAL_SET,
+                    constant: 'dynamic',
+                    rhs: '42')),
+    const Test(
+        '''
         m() => dynamic += 42;
         ''',
         const Visit(VisitKind.VISIT_DYNAMIC_TYPE_LITERAL_COMPOUND,
-                    constant: 'Type',
+                    constant: 'dynamic',
                     operator: '+=',
                     rhs: '42')),
     const Test(
@@ -1542,14 +1549,14 @@ const Map<String, List<Test>> SEND_TESTS = const {
         m() => ++dynamic;
         ''',
         const Visit(VisitKind.VISIT_DYNAMIC_TYPE_LITERAL_PREFIX,
-                    constant: 'Type',
+                    constant: 'dynamic',
                     operator: '++')),
     const Test(
         '''
         m() => dynamic--;
         ''',
         const Visit(VisitKind.VISIT_DYNAMIC_TYPE_LITERAL_POSTFIX,
-                    constant: 'Type',
+                    constant: 'dynamic',
                     operator: '--')),
   ],
   'Assert': const [