Added UnguessableToken.java .

base/android/jni_unguessable_token.cc

Index: base/android/jni_unguessable_token.cc
diff --git a/base/android/jni_unguessable_token.cc b/base/android/jni_unguessable_token.cc
new file mode 100644
index 0000000000000000000000000000000000000000..fd72b2eb539e08e3014b9f029f52d74de742c954
--- /dev/null
+++ b/base/android/jni_unguessable_token.cc
@@ -0,0 +1,40 @@
+// 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.
+
+#include "base/android/jni_unguessable_token.h"
+
+#include "jni/UnguessableToken_jni.h"
+
+namespace base {
+namespace android {
+
+ScopedJavaLocalRef<jobject> CreateJavaUnguessableToken(
+    JNIEnv* env,
+    const base::UnguessableToken& token) {
+  const uint64_t high = token.GetHighForSerialization();
+  const uint64_t low = token.GetLowForSerialization();
+  DCHECK(high);
+  DCHECK(low);
+  return Java_UnguessableToken_create(env, high, low);
+}
+
+base::UnguessableToken ConvertFromJavaUnguessableToken(
+    JNIEnv* env,
+    const JavaRef<jobject>& token) {
+  const uint64_t high =
+      Java_UnguessableToken_getHighForSerialization(env, token);
+  const uint64_t low = Java_UnguessableToken_getLowForSerialization(env, token);
+  DCHECK(high);
+  DCHECK(low);
+  return base::UnguessableToken::Deserialize(high, low);
+}
+
+ScopedJavaLocalRef<jobject> ParcelAndUnparcelUnguessableTokenForTesting(
+    JNIEnv* env,
+    const JavaRef<jobject>& token) {
+  return Java_UnguessableToken_parcelAndUnparcelForTesting(env, token);
+}
+
+}  // namespace android
+}  // namespace base