Changing SpawnChild to return a struct.

base/android/java/src/org/chromium/base/ParcelableChannelClient.java

Index: base/android/java/src/org/chromium/base/ParcelableChannelClient.java
diff --git a/base/android/java/src/org/chromium/base/ParcelableChannelClient.java b/base/android/java/src/org/chromium/base/ParcelableChannelClient.java
new file mode 100644
index 0000000000000000000000000000000000000000..4fe1e446c77af6f499278c98b88dbe0a7f1c4c1c
--- /dev/null
+++ b/base/android/java/src/org/chromium/base/ParcelableChannelClient.java
@@ -0,0 +1,36 @@
+// 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.
+
+package org.chromium.base;
+
+import android.os.Parcelable;
+import android.os.RemoteException;
+
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+
+/**
+ * Wraps a IParcelableChannel so it can be called from native code.
+ */
+@JNINamespace("base::android")
+public final class ParcelableChannelClient {
+    private static final String TAG = "ParcelableChanClient";
+
+    private IParcelableChannel mIParcelableChannel;
+
+    public ParcelableChannelClient(IParcelableChannel parcelableChannel) {
+        mIParcelableChannel = parcelableChannel;
+    }
+
+    @CalledByNative
+    public boolean sendParcelable(int id, Parcelable parcelable) {
+        try {
+            mIParcelableChannel.sendParcelable(new ParcelableWrapper(id, parcelable));
+            return true;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Failed to send parcelable.", e);
+            return false;
+        }
+    }
+}