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sdk/lib/_internal/compiler/implementation/typechecker.dart

Index: sdk/lib/_internal/compiler/implementation/typechecker.dart
diff --git a/sdk/lib/_internal/compiler/implementation/typechecker.dart b/sdk/lib/_internal/compiler/implementation/typechecker.dart
index bbce5fe1198fe99f3cb7b9c3c426169c39b7c22a..9aa6409e5d89c9dbe5428344afe2c79f9b314bc2 100644
--- a/sdk/lib/_internal/compiler/implementation/typechecker.dart
+++ b/sdk/lib/_internal/compiler/implementation/typechecker.dart
@@ -364,7 +364,7 @@ class TypeCheckerVisitor extends Visitor<DartType> {
   void checkTypePromotion(Node node, TypePromotion typePromotion,
                           {bool checkAccesses: false}) {
     VariableElement variable = typePromotion.variable;
-    SourceString variableName = variable.name;
+    String variableName = variable.name;
     List<Node> potentialMutationsIn =
         elements.getPotentialMutationsIn(node, variable);
     if (!potentialMutationsIn.isEmpty) {
@@ -932,7 +932,7 @@ class TypeCheckerVisitor extends Visitor<DartType> {
             TypePromotion typePromotion =
                 new TypePromotion(node, variable, shownType);
             if (!types.isMoreSpecific(shownType, knownType)) {
-              SourceString variableName = variable.name;
+              String variableName = variable.name;
               if (types.isMoreSpecific(shownType.asRaw(), knownType)) {
                 //trace('$node');
                 typePromotion.addHint(node,