Changing SpawnChild to return a struct.

base/android/parcelable_channel_client.h

+// 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 BASE_ANDROID_PARCELABLE_CHANNEL_CLIENT_H_
+#define BASE_ANDROID_PARCELABLE_CHANNEL_CLIENT_H_
+
+#include "base/android/scoped_java_ref.h"
+#include "base/base_export.h"
+
+namespace base {
+namespace android {
+
+class BASE_EXPORT ParcelableChannelClient {
+ public:
+  ParcelableChannelClient();
+  explicit ParcelableChannelClient(
+      const base::android::JavaRef<jobject>& j_parcelable_channel);
+
+  ParcelableChannelClient(ParcelableChannelClient&& other);
+  ParcelableChannelClient& operator=(ParcelableChannelClient&& other);
+
+  bool is_valid() const { return !j_parcelable_channel_.is_null(); }
+
+  // Sends the |parcelable| over the channel.
+  void SendParcelable(uint32_t id,
+                      base::android::ScopedJavaLocalRef<jobject> parcelable);
+
+ private:
+  base::android::ScopedJavaGlobalRef<jobject> j_parcelable_channel_;
+
+  DISALLOW_COPY_AND_ASSIGN(ParcelableChannelClient);
+};
+
+}  // namespace android
+}  // namespace base
+
+#endif  // #define BASE_ANDROID_PARCELABLE_CHANNEL_CLIENT_H_