Refactor and extend SnippetsBridge for multi-section support

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
deleted file mode 100644
index baab92e41136dcc9fbe069c6a25463de0cf3a8d1..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsSource.java
+++ /dev/null
@@ -1,55 +0,0 @@
-// 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 org.chromium.chrome.browser.ntp.snippets.CategoryStatus.CategoryStatusEnum;
-import org.chromium.chrome.browser.ntp.snippets.KnownCategories.KnownCategoriesEnum;
-
-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 onSuggestionsReceived(@KnownCategoriesEnum int category,
-                List<SnippetArticleListItem> snippets);
-
-        /** Called when a category changed its status. */
-        void onCategoryStatusChanged(@KnownCategoriesEnum int category,
-                @CategoryStatusEnum int newStatus);
-    }
-
-    /**
-     * Tells the source to discard the snippet.
-     */
-    public void discardSnippet(SnippetArticleListItem snippet);
-
-    /**
-     * Fetches the thumbnail image for a snippet.
-     */
-    public void fetchSnippetImage(SnippetArticleListItem snippet, Callback<Bitmap> callback);
-
-    /**
-     * Checks whether a snippet has been visited.
-     */
-    public void getSnippedVisited(SnippetArticleListItem snippet, Callback<Boolean> callback);
-
-    /**
-     * Sets the recipient for the fetched snippets.
-     */
-    public void setObserver(SnippetsObserver observer);
-
-    /**
-     * Gives the reason snippets are disabled.
-     */
-    public int getCategoryStatus(@KnownCategoriesEnum int category);
-}