Semantic highlighting for LABEL elements.

pkg/analysis_server/lib/src/computer/computer_highlights.dart

Index: pkg/analysis_server/lib/src/computer/computer_highlights.dart
diff --git a/pkg/analysis_server/lib/src/computer/computer_highlights.dart b/pkg/analysis_server/lib/src/computer/computer_highlights.dart
index c01c4ac0bf2598ba234e4e1b8f50b9e51dce6f5b..83480b1b43e59b94883dbd124d97c17ef0533202 100644
--- a/pkg/analysis_server/lib/src/computer/computer_highlights.dart
+++ b/pkg/analysis_server/lib/src/computer/computer_highlights.dart
@@ -82,6 +82,9 @@ class DartUnitHighlightsComputer {
     if (_addIdentifierRegion_importPrefix(node)) {
       return;
     }
+    if (_addIdentifierRegion_label(node)) {
+      return;
+    }
     if (_addIdentifierRegion_localVariable(node)) {
       return;
     }
@@ -225,6 +228,14 @@ class DartUnitHighlightsComputer {
     return false;
   }
 
+  bool _addIdentifierRegion_label(SimpleIdentifier node) {
+    Element element = node.staticElement;
+    if (element is! LabelElement) {
+      return false;
+    }
+    return _addRegion_node(node, HighlightRegionType.LABEL);
+  }
+
   bool _addIdentifierRegion_localVariable(SimpleIdentifier node) {
     Element element = node.staticElement;
     if (element is! LocalVariableElement) {