Changing SpawnChild to return a struct.

mojo/edk/embedder/parcelable_channel.h

Index: mojo/edk/embedder/parcelable_channel.h
diff --git a/mojo/edk/embedder/parcelable_channel.h b/mojo/edk/embedder/parcelable_channel.h
new file mode 100644
index 0000000000000000000000000000000000000000..4ebb68dfae3c98d62d69441fff22840f8111f172
--- /dev/null
+++ b/mojo/edk/embedder/parcelable_channel.h
@@ -0,0 +1,39 @@
+// Copyright 2017 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.
+
+#ifndef MOJO_EDK_EMBEDDER_PARCELABLE_CHANNEL_H_
+#define MOJO_EDK_EMBEDDER_PARCELABLE_CHANNEL_H_
+
+#include "base/android/scoped_java_ref.h"
+#include "mojo/edk/system/system_impl_export.h"
+
+namespace mojo {
+namespace edk {
+
+class MOJO_SYSTEM_IMPL_EXPORT ParcelableChannel {
+ public:
+  ParcelableChannel();
+  explicit ParcelableChannel(
+      const base::android::JavaRef<jobject>& j_parcelable_channel);
+
+  ParcelableChannel(ParcelableChannel&& other);
+  ParcelableChannel& operator=(ParcelableChannel&& other);
+
+  // Sends the |parcelable| over the channel.
+  // void SendParcelable(uint32_t id, base::android::ScopedJavaLocalRef<jobject>
+  // parcelable);
+  void SendParcelable(uint32_t id, jobject parcelable);
+
+  base::android::ScopedJavaLocalRef<jobject> GetParcelable(uint32_t id);
+
+ private:
+  base::android::ScopedJavaGlobalRef<jobject> j_parcelable_channel_;
+
+  DISALLOW_COPY_AND_ASSIGN(ParcelableChannel);
+};
+
+}  // namespace edk
+}  // namespace mojo
+
+#endif  // #define MOJO_EDK_EMBEDDER_PARCELABLE_CHANNEL_H_