Remove warnings from dart2js test-suite.

tests/compiler/dart2js/type_variable_occurrence_test.dart

Index: tests/compiler/dart2js/type_variable_occurrence_test.dart
diff --git a/tests/compiler/dart2js/type_variable_occurrence_test.dart b/tests/compiler/dart2js/type_variable_occurrence_test.dart
index 1d51adf4fd0a914d50654dea9644058abcc388ab..5c71028ff6c2942d00cb006a272e8a3d94822c7c 100644
--- a/tests/compiler/dart2js/type_variable_occurrence_test.dart
+++ b/tests/compiler/dart2js/type_variable_occurrence_test.dart
@@ -57,10 +57,10 @@ testTypeVariableOccurrence() {
 
     ClassElement A = env.getElement('A');
 
-    expect(bool expect, String memberName) {
+    expect(bool expectResult, String memberName) {
       DartType memberType = env.getMemberType(A, memberName);
       TypeVariableType typeVariable = memberType.typeVariableOccurrence;
-      if (expect) {
+      if (expectResult) {
         Expect.isNotNull(typeVariable);
         Expect.equals(A, Types.getClassContext(memberType));
       } else {