Java: Implements union generation.

mojo/public/java/BUILD.gn

 # 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.
 
 import("//build/config/android/rules.gni")
 
 android_library("system") {
   java_files = [
     "system/src/org/chromium/mojo/system/AsyncWaiter.java",
     "system/src/org/chromium/mojo/system/Core.java",
@@ skipping 12 matching lines @@
   ]
 }
 
 android_library("bindings") {
   java_files = [
     "bindings/src/org/chromium/mojo/bindings/AutoCloseableRouter.java",
     "bindings/src/org/chromium/mojo/bindings/BindingsHelper.java",
     "bindings/src/org/chromium/mojo/bindings/Callbacks.java",
     "bindings/src/org/chromium/mojo/bindings/ConnectionErrorHandler.java",
     "bindings/src/org/chromium/mojo/bindings/Connector.java",
+    "bindings/src/org/chromium/mojo/bindings/DataHeader.java",
     "bindings/src/org/chromium/mojo/bindings/Decoder.java",
     "bindings/src/org/chromium/mojo/bindings/DelegatingConnectionErrorHandler.java",
     "bindings/src/org/chromium/mojo/bindings/DeserializationException.java",
     "bindings/src/org/chromium/mojo/bindings/Encoder.java",
     "bindings/src/org/chromium/mojo/bindings/ExecutorFactory.java",
     "bindings/src/org/chromium/mojo/bindings/HandleOwner.java",
     "bindings/src/org/chromium/mojo/bindings/InterfaceControlMessagesHelper.java",
     "bindings/src/org/chromium/mojo/bindings/Interface.java",
     "bindings/src/org/chromium/mojo/bindings/InterfaceRequest.java",
     "bindings/src/org/chromium/mojo/bindings/MessageHeader.java",
     "bindings/src/org/chromium/mojo/bindings/Message.java",
     "bindings/src/org/chromium/mojo/bindings/MessageReceiver.java",
     "bindings/src/org/chromium/mojo/bindings/MessageReceiverWithResponder.java",
     "bindings/src/org/chromium/mojo/bindings/RouterImpl.java",
     "bindings/src/org/chromium/mojo/bindings/Router.java",
     "bindings/src/org/chromium/mojo/bindings/SerializationException.java",
     "bindings/src/org/chromium/mojo/bindings/ServiceMessage.java",
     "bindings/src/org/chromium/mojo/bindings/SideEffectFreeCloseable.java",
     "bindings/src/org/chromium/mojo/bindings/Struct.java",
+    "bindings/src/org/chromium/mojo/bindings/Union.java",
   ]
 
   deps = [
     ":system",
   ]
 
   srcjar_deps = [ "../interfaces/bindings:bindings_java_sources" ]
 }
 
 android_library("application") {
   java_files = [
     "application/src/org/chromium/mojo/application/ApplicationConnection.java",
     "application/src/org/chromium/mojo/application/ApplicationDelegate.java",
     "application/src/org/chromium/mojo/application/ApplicationImpl.java",
     "application/src/org/chromium/mojo/application/ApplicationRunner.java",
     "application/src/org/chromium/mojo/application/ServiceFactoryBinder.java",
     "application/src/org/chromium/mojo/application/ShellHelper.java",
   ]
   deps = [
     ":bindings",
     ":system",
     "../interfaces/application:application_java",
   ]
 }