in dartc, generics in Typedef not working as expected, when extending generic type

compiler/javatests/com/google/dart/compiler/CompilerTestCase.java

Index: compiler/javatests/com/google/dart/compiler/CompilerTestCase.java
diff --git a/compiler/javatests/com/google/dart/compiler/CompilerTestCase.java b/compiler/javatests/com/google/dart/compiler/CompilerTestCase.java
index 02f7c585394122a9230030383fd1318efd4f880a..3fa1139a0867705e807de9bd93d67d0e69c9fecd 100644
--- a/compiler/javatests/com/google/dart/compiler/CompilerTestCase.java
+++ b/compiler/javatests/com/google/dart/compiler/CompilerTestCase.java
@@ -8,6 +8,7 @@ import static com.google.dart.compiler.common.ErrorExpectation.assertErrors;
 
 import com.google.common.collect.Lists;
 import com.google.dart.compiler.CommandLineOptions.CompilerOptions;
+import com.google.dart.compiler.ast.DartFunctionTypeAlias;
 import com.google.dart.compiler.ast.DartInvocation;
 import com.google.dart.compiler.ast.DartNewExpression;
 import com.google.dart.compiler.ast.DartNode;
@@ -327,4 +328,18 @@ public abstract class CompilerTestCase extends TestCase {
     });
     return result[0];
   }
+
+  protected static DartFunctionTypeAlias findTypedef(DartNode rootNode, final String name) {
+    final DartFunctionTypeAlias result[] = new DartFunctionTypeAlias[1];
+    rootNode.accept(new DartNodeTraverser<Void>() {
+      @Override
+      public Void visitFunctionTypeAlias(DartFunctionTypeAlias node) {
+        if (node.getName().getTargetName().equals(name)) {
+          result[0] = node;
+        }
+        return null;
+      }
+    });
+    return result[0];
+  }
 }