b40c30898c
With the `nodeCovering` utility, ElementLocator is given the
SimpleIdentifier _under_ a ConstructorSelector, in code like:
```dart
enum E {
one, two.^new();
}
```
ElementLocator previously did not handle this SimpleIdentifier
correctly.
Change-Id: I32296dea2aaef6df33e56da23b77a4f83d06c9e6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/423063
Commit-Queue: Samuel Rawlins <srawlins@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>