Implement IsReadyToPay handling

content/public/android/java/src/org/chromium/IsReadyToPayServiceCallback.aidl

Index: content/public/android/java/src/org/chromium/IsReadyToPayServiceCallback.aidl
diff --git a/content/public/android/java/src/org/chromium/IsReadyToPayServiceCallback.aidl b/content/public/android/java/src/org/chromium/IsReadyToPayServiceCallback.aidl
new file mode 100644
index 0000000000000000000000000000000000000000..f832740f20a09917ba7b9039b7fdf193f411fada
--- /dev/null
+++ b/content/public/android/java/src/org/chromium/IsReadyToPayServiceCallback.aidl
@@ -0,0 +1,20 @@
+// 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;
+
+/**
+ * Helper interface to report back whether the
+ * payment app is ready for payment.
+ */
+oneway interface IsReadyToPayServiceCallback {

[please use gerrit instead, 2017/01/13 20:54:46]

By the way, Android Studio is complaining about "oneway" on the interface
definition. It thinks that "oneway" is allowed only on methods. Have you tested
this to work?

[rwlbuis, 2017/01/13 22:12:25]

It is confusing, in an article I saw both ways are fine. But the actual
documentation that I found is pretty vague.

I get the same warning in Android Studio, so I'll verify first that putting
oneway on the method works.

[rwlbuis, 2017/01/17 20:00:35]

Okay, basically adding it on the interface is as good as not adding it at all.
At least, the generated java is the same.

When putting the oneway on the method the generated code is not the same. I
changed my local BobPay to also put the oneway on the methods and it works fine.

+    /**
+     * Method to be called by the Service to indicate
+     * whether the payment app is ready for payment.
+     *
+     * @param isReadyToPay Whether payment app is ready to pay.
+     */
+    void handleIsReadyToPay(boolean isReadyToPay);
+}
+

[please use gerrit instead, 2017/01/13 20:54:46]

nit: no trailing newline