Java: Introduce ResultAnd<> and use it.

mojo/public/java/system/src/org/chromium/mojo/system/InvalidHandle.java

Index: mojo/public/java/system/src/org/chromium/mojo/system/InvalidHandle.java
diff --git a/mojo/public/java/system/src/org/chromium/mojo/system/InvalidHandle.java b/mojo/public/java/system/src/org/chromium/mojo/system/InvalidHandle.java
index d92da7ebc68077ce8bffb497e98654590d39d757..9dff70e2e63c4f9d9255ffceaa01c65e44a4ad6f 100644
--- a/mojo/public/java/system/src/org/chromium/mojo/system/InvalidHandle.java
+++ b/mojo/public/java/system/src/org/chromium/mojo/system/InvalidHandle.java
@@ -145,7 +145,7 @@ public class InvalidHandle implements UntypedHandle, MessagePipeHandle, Consumer
      * @see DataPipe.ProducerHandle#writeData(java.nio.ByteBuffer, DataPipe.WriteFlags)
      */
     @Override
-    public int writeData(ByteBuffer elements, DataPipe.WriteFlags flags) {
+    public ResultAnd<Integer> writeData(ByteBuffer elements, DataPipe.WriteFlags flags) {
         throw new MojoException(MojoResult.INVALID_ARGUMENT);
     }
 
@@ -178,7 +178,7 @@ public class InvalidHandle implements UntypedHandle, MessagePipeHandle, Consumer
      * @see DataPipe.ConsumerHandle#readData(java.nio.ByteBuffer, DataPipe.ReadFlags)
      */
     @Override
-    public int readData(ByteBuffer elements, DataPipe.ReadFlags flags) {
+    public ResultAnd<Integer> readData(ByteBuffer elements, DataPipe.ReadFlags flags) {
         throw new MojoException(MojoResult.INVALID_ARGUMENT);
     }
 
@@ -212,8 +212,8 @@ public class InvalidHandle implements UntypedHandle, MessagePipeHandle, Consumer
      * @see MessagePipeHandle#readMessage(java.nio.ByteBuffer, int, MessagePipeHandle.ReadFlags)
      */
     @Override
-    public ReadMessageResult readMessage(ByteBuffer bytes, int maxNumberOfHandles,
-            ReadFlags flags) {
+    public ResultAnd<ReadMessageResult> readMessage(
+            ByteBuffer bytes, int maxNumberOfHandles, ReadFlags flags) {
         throw new MojoException(MojoResult.INVALID_ARGUMENT);
     }