Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/enhancedbookmarks/EnhancedBookmarkUIObserver.java

+// Copyright 2015 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.enhancedbookmarks;
+
+import org.chromium.components.bookmarks.BookmarkId;
+
+import java.util.List;
+
+/**
+ * Observer interface to get notification for UI mode changes, bookmark changes, and other related
+ * event that affects UI. All enhanced bookmark UI components are expected to implement this and
+ * update themselves correctly on each event.
+ */
+interface EnhancedBookmarkUIObserver {
+    void onEnhancedBookmarkDelegateInitialized(EnhancedBookmarkDelegate delegate);
+
+    /**
+     * Called when the entire UI is being destroyed and will be no longer in use.
+     */
+    void onDestroy();
+
+    /**
+     * @see EnhancedBookmarkDelegate#openAllBookmarks()
+     */
+    void onAllBookmarksStateSet();
+
+    /**
+     * @see EnhancedBookmarkDelegate#openFolder(BookmarkId)
+     */
+    void onFolderStateSet(BookmarkId folder);
+
+    /**
+     * @see EnhancedBookmarkDelegate#openFilter(String)
+     */
+    void onFilterStateSet(String filter);
+
+    /**
+     * Please refer to
+     * {@link EnhancedBookmarkDelegate#toggleSelectionForBookmark(BookmarkId)},
+     * {@link EnhancedBookmarkDelegate#clearSelection()} and
+     * {@link EnhancedBookmarkDelegate#getSelectedBookmarks()}
+     */
+    void onSelectionStateChange(List<BookmarkId> selectedBookmarks);
+
+    /**
+     * @see EnhancedBookmarkDelegate#setListModeEnabled(boolean)
+     */
+    void onListModeChange(boolean isListModeEnabled);
+}