Upstream Chrome on iOS source code [3/11].

ios/chrome/browser/ui/bookmarks/bookmark_folder_collection_view.h

+// Copyright 2014 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_FOLDER_COLLECTION_VIEW_H_
+#define IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_FOLDER_COLLECTION_VIEW_H_
+
+#import "ios/chrome/browser/ui/bookmarks/bookmark_collection_view.h"
+
+@class BookmarkFolderCollectionView;
+
+namespace bookmarks {
+class BookmarkNode;
+}  // namespace bookmarks
+
+@protocol BookmarkFolderCollectionViewDelegate<BookmarkCollectionViewDelegate>
+// Tells the delegate that a folder was selected for navigation.
+- (void)bookmarkFolderCollectionView:(BookmarkFolderCollectionView*)view
+         selectedFolderForNavigation:(const bookmarks::BookmarkNode*)folder;
+@end
+
+// Shows all sub-folders and sub-urls of a folder node in a collection view.
+// Note: This class intentionally does not try to maintain state through a
+// folder transition. Depending on the type of animation that the designers
+// choose, we may require multiple instances of this view.
+@interface BookmarkFolderCollectionView : BookmarkCollectionView
+
+// Refreshes the entire view to reflect |folder|.
+- (void)resetFolder:(const bookmarks::BookmarkNode*)folder;
+
+// Called when something outside the view causes the promo state to change.
+- (void)promoStateChangedAnimated:(BOOL)animate;
+
+@property(nonatomic, assign) id<BookmarkFolderCollectionViewDelegate> delegate;
+@property(nonatomic, assign, readonly) const bookmarks::BookmarkNode* folder;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_FOLDER_COLLECTION_VIEW_H_