Adding a router class to handle messages that expect responses.

mojo/bindings/java/src/org/chromium/mojo/bindings/Router.java

Index: mojo/bindings/java/src/org/chromium/mojo/bindings/Router.java
diff --git a/mojo/bindings/java/src/org/chromium/mojo/bindings/Router.java b/mojo/bindings/java/src/org/chromium/mojo/bindings/Router.java
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+++ b/mojo/bindings/java/src/org/chromium/mojo/bindings/Router.java
@@ -0,0 +1,37 @@
+// Copyright 2014 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.mojo.bindings;
+
+import org.chromium.mojo.system.MessagePipeHandle;
+
+/**
+ * A {@link Router} will handle mojo message and forward those to a {@link Connector}. It deals with
+ * parsing of headers and adding of request ids in order to be able to match a response to a
+ * request.
+ */
+public interface Router extends MessageReceiverWithResponder, HandleOwner<MessagePipeHandle> {
+
+    /**
+     * Start listening for incoming messages.
+     */
+    public void start();
+
+    /**
+     * Set the {@link MessageReceiverWithResponder} that will deserialize and use the message
+     * received from the pipe.
+     */
+    public void setIncomingMessageReceiver(MessageReceiverWithResponder incomingMessageReceiver);
+
+    /**
+     * Set the handle that will be notified of errors on the message pipe.
+     */
+    public void setErrorHandler(ConnectionErrorHandler errorHandler);
+
+    /**
+     * @see java.io.Closeable#close()
+     */
+    @Override
+    public void close();
+}