Create Java infrastructure for UI Render Tests.

chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsSource.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsSource.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsSource.java b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsSource.java
new file mode 100644
index 0000000000000000000000000000000000000000..3e5adb83e45e28489fb8636f26d68110a26312c7
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsSource.java
@@ -0,0 +1,52 @@
+// Copyright 2016 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.ntp.snippets;
+
+import android.graphics.Bitmap;
+
+import org.chromium.base.Callback;
+
+import java.util.List;
+
+
+/**
+ * An interface for classes that provide Snippets.
+ */
+public interface SnippetsSource {
+    /**
+     * An observer for events in the snippets service.
+     */
+    public interface SnippetsObserver {
+        void onSnippetsReceived(List<SnippetArticle> snippets);
+
+        /** Called when the service is about to change its state. */
+        void onDisabledReasonChanged(int disabledReason);
+    }
+
+    /**
+     * Tells the source to discard the snippet.
+     */
+    public void discardSnippet(SnippetArticle snippet);
+
+    /**
+     * Fetches the thumbnail image for a snippet.
+     */
+    public void fetchSnippetImage(SnippetArticle snippet, Callback<Bitmap> callback);
+
+    /**
+     * Checks whether a snippet has been visited.
+     */
+    public void getSnippedVisited(SnippetArticle snippet, Callback<Boolean> callback);
+
+    /**
+     * Sets the recipient for the fetched snippets.
+     */
+    public void setObserver(SnippetsObserver observer);
+
+    /**
+     * Gives the reason snippets are disabled.
+     */
+    public int getDisabledReason();
+}