Consolidate duplicate code for resloving URIs.

pkg/analyzer/test/generated/test_support.dart

Index: pkg/analyzer/test/generated/test_support.dart
diff --git a/pkg/analyzer/test/generated/test_support.dart b/pkg/analyzer/test/generated/test_support.dart
index 803ff8ce1aa8b86f17943cf90043f99c5b18db82..1168c8bd1a3572c781d27f0854ba11b4a63e2196 100644
--- a/pkg/analyzer/test/generated/test_support.dart
+++ b/pkg/analyzer/test/generated/test_support.dart
@@ -624,10 +624,6 @@ class TestSource extends Source {
     throw new UnsupportedOperationException();
   }
 
-  Uri resolveRelativeUri(Uri uri) {
-    return new Uri(scheme: 'file', path: _name).resolveUri(uri);
-  }
-
   void setContents(String value) {
     generateExceptionOnRead = false;
     _modificationStamp = new DateTime.now().millisecondsSinceEpoch;
@@ -663,8 +659,4 @@ class TestSourceWithUri extends TestSource {
     }
     return false;
   }
-
-  Uri resolveRelativeUri(Uri uri) {
-    return this.uri.resolveUri(uri);
-  }
 }