Add SafeVarargs annotation.

Change-Id: I61c7f480ccd4b5c5f2a40de32a08e8aa7d2e589e
diff --git a/user/super/com/google/gwt/emul/java/lang/SafeVarargs.java b/user/super/com/google/gwt/emul/java/lang/SafeVarargs.java
new file mode 100644
index 0000000..c59ab71
--- /dev/null
+++ b/user/super/com/google/gwt/emul/java/lang/SafeVarargs.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2008 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package java.lang;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Claims to the compiler that the annotation target does nothing potentially unsafe
+ * to its varargs argument.
+ */
+@Documented
+@Retention(value = RetentionPolicy.RUNTIME)
+@Target(value = {ElementType.CONSTRUCTOR, ElementType.METHOD})
+public @interface SafeVarargs {
+}
+