Java: Introduce ResultAnd<> and use it.

mojo/android/javatests/src/org/chromium/mojo/bindings/RouterTest.java

Index: mojo/android/javatests/src/org/chromium/mojo/bindings/RouterTest.java
diff --git a/mojo/android/javatests/src/org/chromium/mojo/bindings/RouterTest.java b/mojo/android/javatests/src/org/chromium/mojo/bindings/RouterTest.java
index f28b2ab5cde1e7f7678e1bd349eb39ea9d8dcd2c..f976e590da3f803dbcf1b24d70bf1b3ba6417640 100644
--- a/mojo/android/javatests/src/org/chromium/mojo/bindings/RouterTest.java
+++ b/mojo/android/javatests/src/org/chromium/mojo/bindings/RouterTest.java
@@ -14,6 +14,7 @@ import org.chromium.mojo.system.Handle;
 import org.chromium.mojo.system.MessagePipeHandle;
 import org.chromium.mojo.system.MojoResult;
 import org.chromium.mojo.system.Pair;
+import org.chromium.mojo.system.ResultAnd;
 import org.chromium.mojo.system.impl.CoreImpl;
 
 import java.nio.ByteBuffer;
@@ -61,8 +62,8 @@ public class RouterTest extends MojoTestCase {
         header.encode(encoder);
         mRouter.acceptWithResponder(encoder.getMessage(), mReceiver);
         ByteBuffer receiveBuffer = ByteBuffer.allocateDirect(header.getSize());
-        MessagePipeHandle.ReadMessageResult result = mHandle.readMessage(receiveBuffer, 0,
-                MessagePipeHandle.ReadFlags.NONE);
+        ResultAnd<MessagePipeHandle.ReadMessageResult> result =
+                mHandle.readMessage(receiveBuffer, 0, MessagePipeHandle.ReadFlags.NONE);
 
         assertEquals(MojoResult.OK, result.getMojoResult());
         MessageHeader receivedHeader = new Message(
@@ -121,8 +122,8 @@ public class RouterTest extends MojoTestCase {
         Message message = encoder.getMessage();
         receivedMessage.second.accept(message);
         ByteBuffer receivedResponseMessage = ByteBuffer.allocateDirect(responseHeader.getSize());
-        MessagePipeHandle.ReadMessageResult result = mHandle.readMessage(receivedResponseMessage, 0,
-                MessagePipeHandle.ReadFlags.NONE);
+        ResultAnd<MessagePipeHandle.ReadMessageResult> result =
+                mHandle.readMessage(receivedResponseMessage, 0, MessagePipeHandle.ReadFlags.NONE);
 
         assertEquals(MojoResult.OK, result.getMojoResult());
         assertEquals(message.getData(), receivedResponseMessage);