Interface change for the "there and back again" handler

Change-Id: I8883e99c1a412b4489781c1b556895af07260c86
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2128833
Commit-Queue: Peter Williamson <petewil@chromium.org>
Reviewed-by: Cathy Li <chili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755138}

chrome/browser/xsurface/BUILD.gn

@@ -6,6 +6,7 @@ import("//build/config/android/rules.gni")
 
 android_library("java") {
   sources = [
+    "android/java/src/org/chromium/chrome/browser/xsurface/FeedActionsHandler.java",
     "android/java/src/org/chromium/chrome/browser/xsurface/HybridListRenderer.java",
     "android/java/src/org/chromium/chrome/browser/xsurface/ListContentManager.java",
     "android/java/src/org/chromium/chrome/browser/xsurface/ListContentManagerObserver.java",

chrome/browser/xsurface/android/java/src/org/chromium/chrome/browser/xsurface/FeedActionsHandler.java

+// Copyright 2020 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.chrome.browser.xsurface;
+
+/**
+ * Interface to provide chromium calling points for a feed.
+ */
+public interface FeedActionsHandler {
+    String KEY = "FeedActions";
+
+    /**
+     * Sends data back to the server when content is clicked.
+     */
+    void processThereAndBackAgainData(byte[] data);
+}