[remoting android] Plumb It2Me events from C++ to Java

remoting/android/host/src/org/chromium/chromoting/host/jni/It2MeHostObserver.java

Index: remoting/android/host/src/org/chromium/chromoting/host/jni/It2MeHostObserver.java
diff --git a/remoting/android/host/src/org/chromium/chromoting/host/jni/It2MeHostObserver.java b/remoting/android/host/src/org/chromium/chromoting/host/jni/It2MeHostObserver.java
new file mode 100644
index 0000000000000000000000000000000000000000..50605ee194e3f01a11819e022663a8ac4ac9ae41
--- /dev/null
+++ b/remoting/android/host/src/org/chromium/chromoting/host/jni/It2MeHostObserver.java
@@ -0,0 +1,34 @@
+// 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.
+
+package org.chromium.chromoting.host.jni;
+
+/** Interface for receiving events from the C++ implementation of It2MeHost. */
+public interface It2MeHostObserver {
+    /** This corresponds to the C++ enumeration remoting::It2MeHostState. */
+    public enum State {
+        DISCONNECTED,
+        STARTING,
+        REQUESTED_ACCESS_CODE,
+        RECEIVED_ACCESS_CODE,
+        CONNECTED,
+        ERROR,
+        INVALID_DOMAIN_ERROR;
+    }
+
+    /**
+     * Called when a new It2Me access-code is received.
+     * @param accessCode The access code for the It2Me session.
+     * @param lifetimeSeconds Duration for which the access-code remains valid.
+     */
+    void onAccessCodeReceived(String accessCode, int lifetimeSeconds);
+
+    /**
+     * Called when the state has changed.
+     * @param state The new state.
+     * @param errorMessage Used only for the ERROR state. The string is not localized and not
+     *     intended to be shown to a user.
+     */
+    void onStateChanged(State state, String errorMessage);
+}