[Fasta] Include line starts

pkg/front_end/lib/src/fasta/source/source_loader.dart

Index: pkg/front_end/lib/src/fasta/source/source_loader.dart
diff --git a/pkg/front_end/lib/src/fasta/source/source_loader.dart b/pkg/front_end/lib/src/fasta/source/source_loader.dart
index 5e508462945b3ac4b52d8aadfc046d5f5989957a..57769dcbda8cee37020ea27b818c5bb4a1328b0e 100644
--- a/pkg/front_end/lib/src/fasta/source/source_loader.dart
+++ b/pkg/front_end/lib/src/fasta/source/source_loader.dart
@@ -63,9 +63,7 @@ class SourceLoader<L> extends Loader<L> {
       byteCount += bytes.length - 1;
       ScannerResult result = scan(bytes);
       Token token = result.tokens;
-      if (!suppressLexicalErrors) {
-        target.addLineStarts(library.fileUri, result.lineStarts);
-      }
+      target.addLineStarts(library.fileUri, result.lineStarts);

[ahe, 2017/03/03 09:03:58]

Are you sure this is necessary?

       while (token is ErrorToken) {
         if (!suppressLexicalErrors) {
           ErrorToken error = token;