Creates common super class for bookmark handset and tablet view controllers

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

Index: ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.h
diff --git a/ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.h b/ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..c7b5d2c7b6939d1a6b205e4a0d33019d3351b382
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+++ b/ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.h
@@ -0,0 +1,89 @@
+// Copyright 2017 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_HOME_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_BOOKMARKS_HOME_VIEW_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+#include <set>
+#include <vector>
+
+@protocol UrlLoader;
+@protocol BookmarkHomePrimaryView;
+
+namespace ios {
+class ChromeBrowserState;
+}  // namespace ios
+
+namespace bookmarks {
+class BookmarkModel;
+}  // namespace bookmarks
+
+@class BookmarkCollectionView;
+@class BookmarkPanelView;
+@class BookmarkMenuView;
+@class BookmarkHomeWaitingView;
+@class BookmarkNavigationBar;
+@class BookmarkMenuItem;
+
+@interface BookmarkHomeViewController : UIViewController

[noyau (Ping after 24h), 2017/07/07 09:37:18]

Please add a class comment.

[ramyasharma, 2017/07/10 06:55:58]

Done.

+
+// Designated initializer.

[noyau (Ping after 24h), 2017/07/07 09:37:19]

Replace this comment by NS_DESIGNATED_INITIALIZER.

Ideally also add the superclass initializers marked with NS_UNAVAILABLE

[ramyasharma, 2017/07/10 06:55:58]

Done.

+- (instancetype)initWithLoader:(id<UrlLoader>)loader
+                  browserState:(ios::ChromeBrowserState*)browserState;
+
+@property(nonatomic, assign, readonly) bookmarks::BookmarkModel* bookmarks;

[noyau (Ping after 24h), 2017/07/07 09:37:20]

Need a quick comment.

[ramyasharma, 2017/07/10 06:55:58]

Done.

+
+// The user's browser state model used.
+@property(nonatomic, assign, readonly) ios::ChromeBrowserState* browserState;
+
+// View shown from the menu.

[noyau (Ping after 24h), 2017/07/07 09:37:22]

This comment is net very informative. "The main view showing all the bookmarks"
maybe?

[ramyasharma, 2017/07/10 06:55:58]

Done.

+@property(nonatomic, strong, readonly) BookmarkCollectionView* folderView;
+
+@property(nonatomic, weak, readonly) id<UrlLoader> loader;

[noyau (Ping after 24h), 2017/07/07 09:37:22]

Add comment

[ramyasharma, 2017/07/10 06:55:58]

Done.

+
+// The menu with all the folders and special entries.

[noyau (Ping after 24h), 2017/07/07 09:37:18]

I don't think there are any special entries left :)

[ramyasharma, 2017/07/10 06:55:58]

thanks, just copied over the comment from before :). Changed now.

+@property(nonatomic, strong, readonly) BookmarkMenuView* menuView;
+
+// The navigation bar sits on top of the main content.
+@property(nonatomic, strong, readonly) BookmarkNavigationBar* navigationBar;
+
+// At any point in time, there is exactly one collection view whose view is part
+// of the view hierarchy. This property determine which collection view is

[lpromero, 2017/07/07 13:30:09]

*determines

[ramyasharma, 2017/07/10 06:55:58]

Done.

+// visible. Not by accident, this property also reflects the selected menu item
+// in the BookmarkMenuView.

[noyau (Ping after 24h), 2017/07/07 09:37:21]

I think this comment is misleading a bit. I believe there is only one collection
view, period. What is visible in the collection view is determined by this
attribute.

[ramyasharma, 2017/07/10 06:55:58]

Done.

+@property(nonatomic, strong, readonly) BookmarkMenuItem* primaryMenuItem;
+
+@property(nonatomic, strong, readonly) BookmarkPanelView* panelView;

[noyau (Ping after 24h), 2017/07/07 09:37:18]

Can you add a comment? 

[ramyasharma, 2017/07/10 06:55:58]

Done.

+
+// Either the menu or the primaryView can scrollToTop.
+@property(nonatomic, assign) BOOL scrollToTop;
+
+// This view is created and used if the model is not fully loaded yet by the
+// time this controller starts. Property is readwrite, so that subclasses can
+// set it to nil, once finished with it.
+@property(nonatomic, strong) BookmarkHomeWaitingView* waitForModelView;
+
+// This method should be called at most once in the life-cycle of the class.
+// It should be called at the soonest possible time after the view has been
+// loaded, and the bookmark model is loaded.
+- (void)loadBookmarkViews;
+
+// Returns the width of the menu.
+- (CGFloat)menuWidth;
+
+// This method is called if the view needs to be loaded and the model is not
+// ready yet.
+- (void)loadWaitingView;
+
+// Updates the property 'primaryMenuItem'.
+// Updates the UI to reflect the new state of 'primaryMenuItem'.
+- (void)updatePrimaryMenuItem:(BookmarkMenuItem*)menuItem;
+
+// The active collection view that corresponds to primaryMenuItem.
+- (UIView<BookmarkHomePrimaryView>*)primaryView;
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_BOOKMARKS_HOME_VIEW_CONTROLLER_H_