Rename MethodInvocation.period to MethodInvocation.operator.

pkg/analyzer/test/generated/parser_test.dart

Index: pkg/analyzer/test/generated/parser_test.dart
diff --git a/pkg/analyzer/test/generated/parser_test.dart b/pkg/analyzer/test/generated/parser_test.dart
index 648ea6bfa913931cbcdf119ebd4e015801ca4fba..1b2b98fe5f4d028f06bdc550902874076ede3946 100644
--- a/pkg/analyzer/test/generated/parser_test.dart
+++ b/pkg/analyzer/test/generated/parser_test.dart
@@ -4996,7 +4996,7 @@ class SimpleParserTest extends ParserTestCase {
     MethodInvocation section = parse4("parseCascadeSection", "..a(b).c(d)");
     EngineTestCase.assertInstanceOf(
         (obj) => obj is MethodInvocation, MethodInvocation, section.target);
-    expect(section.period, isNotNull);
+    expect(section.operator, isNotNull);
     expect(section.methodName, isNotNull);
     expect(section.argumentList, isNotNull);
     expect(section.argumentList.arguments, hasLength(1));
@@ -5037,7 +5037,7 @@ class SimpleParserTest extends ParserTestCase {
   void test_parseCascadeSection_pa() {
     MethodInvocation section = parse4("parseCascadeSection", "..a(b)");
     expect(section.target, isNull);
-    expect(section.period, isNotNull);
+    expect(section.operator, isNotNull);
     expect(section.methodName, isNotNull);
     expect(section.argumentList, isNotNull);
     expect(section.argumentList.arguments, hasLength(1));