Add summary support for ConstructorElement.nameEnd and .periodOffset.

pkg/analyzer/lib/src/summary/summarize_ast.dart

Index: pkg/analyzer/lib/src/summary/summarize_ast.dart
diff --git a/pkg/analyzer/lib/src/summary/summarize_ast.dart b/pkg/analyzer/lib/src/summary/summarize_ast.dart
index e5115bd710c1e86ee772b698a7b530cb29e9aab9..0c4c79b48b0146ef1d3ca95645a32a0a47adbf32 100644
--- a/pkg/analyzer/lib/src/summary/summarize_ast.dart
+++ b/pkg/analyzer/lib/src/summary/summarize_ast.dart
@@ -840,6 +840,8 @@ class _SummarizeAstVisitor extends RecursiveAstVisitor {
     if (node.name != null) {
       b.name = node.name.name;
       b.nameOffset = node.name.offset;
+      b.periodOffset = node.period.offset;
+      b.nameEnd = node.name.end;
     } else {
       b.nameOffset = node.returnType.offset;
     }