Split PrivateMemberTest multi-test into separate tests.

tests/language/src/PrivateMember1LibB.dart

Index: tests/language/src/PrivateMember1LibB.dart
diff --git a/tests/language/src/PrivateMemberLibB.dart b/tests/language/src/PrivateMember1LibB.dart
similarity index 55%
copy from tests/language/src/PrivateMemberLibB.dart
copy to tests/language/src/PrivateMember1LibB.dart
index fbd28661b9ca349da1bbdbedbca69ba4804880dc..2087c3cebd67ec78c31082d7a38989219974272b 100644
--- a/tests/language/src/PrivateMemberLibB.dart
+++ b/tests/language/src/PrivateMember1LibB.dart
@@ -4,17 +4,8 @@
 
 #library('PrivateMemberLibB');
 
-#import('PrivateMemberTest.dart');
+#import('PrivateMember1NegativeTest.dart');
 
 class B extends A {
-  bool _private1;
-  String _private3;
-
-  static bool _static1;
-  static String _static3;
-
-  bool _fun1() { return true; }
-  String _fun3() { return ""; }
-
-  void _fun4(bool b) { }
+  bool _instanceField;
 }