[Download Home] Use OfflinePage titles & bolster tests

chrome/android/java/src/org/chromium/chrome/browser/download/ui/BackendProvider.java

Index: chrome/android/java/src/org/chromium/chrome/browser/download/ui/BackendProvider.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/ui/BackendProvider.java b/chrome/android/java/src/org/chromium/chrome/browser/download/ui/BackendProvider.java
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+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/ui/BackendProvider.java
@@ -0,0 +1,62 @@
+// 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.download.ui;
+
+import android.content.ComponentName;
+import android.support.annotation.Nullable;
+
+import org.chromium.chrome.browser.offlinepages.downloads.OfflinePageDownloadBridge;
+import org.chromium.chrome.browser.offlinepages.downloads.OfflinePageDownloadItem;
+import org.chromium.chrome.browser.widget.selection.SelectionDelegate;
+
+import java.util.List;
+
+/**
+ * Provides classes that need to be interacted with by the {@link DownloadHistoryAdapter}.
+ */
+public interface BackendProvider {
+
+    /** Interacts with the Downloads backend. */
+    public static interface DownloadDelegate {
+        /** See {@link DownloadManagerService#addDownloadHistoryAdapter}. */
+        void addDownloadHistoryAdapter(DownloadHistoryAdapter adapter);
+
+        /** See {@link DownloadManagerService#removeDownloadHistoryAdapter}. */
+        void removeDownloadHistoryAdapter(DownloadHistoryAdapter adapter);
+
+        /** See {@link DownloadManagerService#getAllDownloads}. */
+        void getAllDownloads(boolean isOffTheRecord);
+    }
+
+    /** Interacts with the Offline Pages backend. */
+    public static interface OfflinePageDelegate {
+        /** See {@link OfflinePageDownloadBridge#addObserver}. */
+        void addObserver(OfflinePageDownloadBridge.Observer observer);
+
+        /** See {@link OfflinePageDownloadBridge#removeObserver}. */
+        void removeObserver(OfflinePageDownloadBridge.Observer observer);
+
+        /** See {@link OfflinePageDownloadBridge#getAllItems}. */
+        List<OfflinePageDownloadItem> getAllItems();
+
+        /** See {@link OfflinePageDownloadBridge#openItem}. */
+        void openItem(String guid, @Nullable ComponentName componentName);
+
+        /** See {@link OfflinePageDownloadBridge#deleteItem}. */
+        void deleteItem(String guid);
+
+        /** See {@link OfflinePageDownloadBridge#destroy}. */
+        void destroy();
+    }
+
+    /** Returns the {@link DownloadDelegate} that works with the Downloads backend. */
+    DownloadDelegate getDownloadDelegate();
+
+    /** Returns the {@link OfflinePageDelegate} that works with the Offline Pages backend. */
+    OfflinePageDelegate getOfflinePageBridge();
+
+    /** Returns the {@link SelectionDelegate} that tracks selected items. */
+    SelectionDelegate<DownloadHistoryItemWrapper> getSelectionDelegate();
+}