Added UnguessableToken.java .

base/android/unguessable_token_android.h

Index: base/android/unguessable_token_android.h
diff --git a/base/android/unguessable_token_android.h b/base/android/unguessable_token_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..bb91f0e5005c02d1a750e7fd796a2f45a5d756af
--- /dev/null
+++ b/base/android/unguessable_token_android.h
@@ -0,0 +1,43 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_ANDROID_UNGUESSABLE_TOKEN_ANDROID_H_
+#define BASE_ANDROID_UNGUESSABLE_TOKEN_ANDROID_H_
+
+#include <jni.h>
+
+#include "base/android/scoped_java_ref.h"
+#include "base/base_export.h"
+#include "base/unguessable_token.h"
+
+namespace base {
+namespace android {
+
+class BASE_EXPORT UnguessableTokenAndroid {
+ public:
+  // Create a Java UnguessableToken with the same value as |token|.
+  static ScopedJavaLocalRef<jobject> Create(
+      JNIEnv* env,
+      const base::UnguessableToken& token);
+
+  // Create a native UnguessableToken from Java UnguessableToken |token|.
+  static base::UnguessableToken FromJavaUnguessableToken(
+      JNIEnv* env,
+      const JavaRef<jobject>& token);
+
+  // Parcel UnguessableToken |token| and unparcel it, and return the result.
+  // While this method is intended for facilitating unit tests, it results only
+  // in a clone of |token|.
+  static ScopedJavaLocalRef<jobject> ParcelAndUnparcelForTesting(
+      JNIEnv* env,
+      const JavaRef<jobject>& token);
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(UnguessableTokenAndroid);
+};
+
+}  // namespace android
+}  // namespace base
+
+#endif  // BASE_ANDROID_UNGUESSABLE_TOKEN_ANDROID_H_