mojo: java bindigns: add factory for InterfaceRequest that takes a client

mojo/public/java/bindings/src/org/chromium/mojo/bindings/InterfaceWithClient.java

Index: mojo/public/java/bindings/src/org/chromium/mojo/bindings/InterfaceWithClient.java
diff --git a/mojo/public/java/bindings/src/org/chromium/mojo/bindings/InterfaceWithClient.java b/mojo/public/java/bindings/src/org/chromium/mojo/bindings/InterfaceWithClient.java
index 225b98a88ce31f7d8a8952e0402830254cfb7761..f7d8afec8a24a8db70d64adade82a9b79a1001d5 100644
--- a/mojo/public/java/bindings/src/org/chromium/mojo/bindings/InterfaceWithClient.java
+++ b/mojo/public/java/bindings/src/org/chromium/mojo/bindings/InterfaceWithClient.java
@@ -6,6 +6,7 @@ package org.chromium.mojo.bindings;
 
 import org.chromium.mojo.system.Core;
 import org.chromium.mojo.system.MessagePipeHandle;
+import org.chromium.mojo.system.Pair;
 
 /**
  * Base class for mojo generated interfaces that have a client.
@@ -89,6 +90,19 @@ public interface InterfaceWithClient<CI extends Interface> extends Interface {
         }
 
         /**
+         * Constructs a new |InterfaceRequest| for the interface. This method returns a Pair where
+         * the first element is a proxy, and the second element is the request. The proxy can be
+         * used immediately.
+         *
+         * @param client the implementation of the client interface.
+         */
+        public final Pair<P, InterfaceRequest<I>> getInterfaceRequest(Core core, CI client) {
+            Pair<MessagePipeHandle, MessagePipeHandle> handles = core.createMessagePipe(null);
+            P proxy = attachProxy(handles.first, client);
+            return Pair.create(proxy, new InterfaceRequest<I>(handles.second));
+        }
+
+        /**
          * Returns a manager for the client inetrafce.
          */
         protected abstract Interface.Manager<CI, ?> getClientManager();