New analyzer snapshot.

editor/util/plugins/com.google.dart.java2dart/resources/java_junit.dart

Index: editor/util/plugins/com.google.dart.java2dart/resources/java_junit.dart
diff --git a/editor/util/plugins/com.google.dart.java2dart/resources/java_junit.dart b/editor/util/plugins/com.google.dart.java2dart/resources/java_junit.dart
index 81b4be08ff99d2342c072c81b9de299601521ed5..6f2c7dab1da94a5fe83afdc5e7e3fd0244f4cf3c 100644
--- a/editor/util/plugins/com.google.dart.java2dart/resources/java_junit.dart
+++ b/editor/util/plugins/com.google.dart.java2dart/resources/java_junit.dart
@@ -25,6 +25,9 @@ class JUnitTestCase {
   static void assertNull(x) {
     expect(x, isNull);
   }
+  static void assertNullMsg(String msg, x) {
+    expect(x, isNullMsg(msg));
+  }
   static void assertNotNull(x) {
     expect(x, isNotNull);
   }
@@ -116,6 +119,18 @@ class _IsFalseWithMessage extends Matcher {
   }
 }
 
+Matcher isNullMsg(String msg) => new _IsNullWithMessage(msg);
+class _IsNullWithMessage extends Matcher {
+  final String msg;
+  const _IsNullWithMessage(this.msg);
+  bool matches(item, Map matchState) {
+    return item == null;
+  }
+  Description describe(Description mismatchDescription) {
+    return mismatchDescription.replace(msg);
+  }
+}
+
 Matcher isNotNullMsg(String msg) => new _IsNotNullWithMessage(msg);
 class _IsNotNullWithMessage extends Matcher {
   final String msg;