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

ios/chrome/browser/ui/bookmarks/bookmark_home_primary_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_HOME_PRIMARY_VIEW_H_
+#define IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_HOME_PRIMARY_VIEW_H_
+
+#import <UIKit/UIKit.h>
+
+// Interface for views that can be set as primary views in the bookmark home
+// controllers (BookmarkHomeHandsetViewController and
+// BookmarkHomeTabletViewController).
+@protocol BookmarkHomePrimaryView<NSObject>
+
+// The collection view of the primary view.
+- (UICollectionView*)collectionView;
+
+// Regardless of the current orientation, returns the y of the content offset of
+// the receiver if it were to have portrait orientation.
+- (CGFloat)contentPositionInPortraitOrientation;
+
+// Called when the content position needs to be updated.
+- (void)applyContentPosition:(CGFloat)position;
+
+// Called when the orientation changes.
+// TODO(crbug.com/390548): Remove the use of this method.
+- (void)changeOrientation:(UIInterfaceOrientation)orientation;
+
+// If the receiver contains a scrollview, this is the occasion to set it up as
+// scrolling to top when the status bar is tapped.
+- (void)setScrollsToTop:(BOOL)scrollsToTop;
+
+// Called when the receiver should change itself to editing mode.
+- (void)setEditing:(BOOL)editing animated:(BOOL)animated;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_HOME_PRIMARY_VIEW_H_