Adding Sign-in promo for bookmark view.

ios/chrome/browser/ui/bookmarks/bookmark_collection_view.mm

 // 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.
 
 #import "ios/chrome/browser/ui/bookmarks/bookmark_collection_view.h"
 
 #import <UIKit/UIGestureRecognizerSubclass.h>
 #include <algorithm>
 #include <map>
 #include <memory>
 
 #include "base/mac/bind_objc_block.h"
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/bookmarks/browser/bookmark_model_observer.h"
 #include "components/favicon/core/fallback_url_util.h"
 #include "components/favicon/core/large_icon_service.h"
 #include "components/favicon_base/fallback_icon_style.h"
 #include "components/favicon_base/favicon_types.h"
 #include "ios/chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "ios/chrome/browser/bookmarks/bookmarks_utils.h"
 #include "ios/chrome/browser/favicon/ios_chrome_large_icon_service_factory.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_collection_cells.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_collection_view_background.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_promo_cell.h"
+#import "ios/chrome/browser/ui/bookmarks/bookmark_signin_promo_cell.h"
 #import "ios/chrome/browser/ui/bookmarks/bookmark_utils_ios.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #include "skia/ext/skia_utils_ios.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
@@ skipping 152 matching lines @@
           forCellWithReuseIdentifier:[BookmarkItemCell reuseIdentifier]];
   [self.collectionView registerClass:[BookmarkHeaderView class]
           forSupplementaryViewOfKind:UICollectionElementKindSectionHeader
                  withReuseIdentifier:[BookmarkHeaderView reuseIdentifier]];
   [self.collectionView
                    registerClass:[BookmarkHeaderSeparatorView class]
       forSupplementaryViewOfKind:UICollectionElementKindSectionHeader
              withReuseIdentifier:[BookmarkHeaderSeparatorView reuseIdentifier]];
   [self.collectionView registerClass:[BookmarkPromoCell class]
           forCellWithReuseIdentifier:[BookmarkPromoCell reuseIdentifier]];
+  [self.collectionView registerClass:[BookmarkSigninPromoCell class]
+          forCellWithReuseIdentifier:[BookmarkSigninPromoCell reuseIdentifier]];
 
   [self addSubview:self.collectionView];
 
   // Set up the background view shown when the collection is empty.
   BookmarkCollectionViewBackground* emptyCollectionBackgroundView =
       [[BookmarkCollectionViewBackground alloc] initWithFrame:CGRectZero];
   self.emptyCollectionBackgroundView = emptyCollectionBackgroundView;
   self.emptyCollectionBackgroundView.autoresizingMask =
       UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
   self.emptyCollectionBackgroundView.alpha = 0;
@@ skipping 470 matching lines @@
     return UIEdgeInsetsZero;
 
   if (IsIPadIdiom()) {
     return UIEdgeInsetsMake(10, rowMarginTablet, 0, rowMarginTablet);
   } else {
     return UIEdgeInsetsZero;
   }
 }
 
 - (CGSize)cellSizeForIndexPath:(NSIndexPath*)indexPath {
-  if ([self isPromoSection:indexPath.section]) {
-    CGRect estimatedFrame = CGRectMake(0, 0, CGRectGetWidth(self.bounds), 100);
-    UICollectionViewCell* cell =
-        [self.collectionView cellForItemAtIndexPath:indexPath];
-    if (!cell) {
-      cell = [[BookmarkPromoCell alloc] initWithFrame:estimatedFrame];
-    }
-    cell.frame = estimatedFrame;
-    [cell layoutIfNeeded];
-    return [cell systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];
-  }
-
+  DCHECK(![self isPromoSection:indexPath.section]);
   UIEdgeInsets insets = [self insetForSectionAtIndex:indexPath.section];
   return CGSizeMake(self.bounds.size.width - (insets.right + insets.left),
                     rowHeight);
 }
 
 - (CGFloat)minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {
   return 0;
 }
 
 - (CGFloat)minimumLineSpacingForSectionAtIndex:(NSInteger)section {
@@ skipping 128 matching lines @@
 
 - (BOOL)shouldShowPromoCell {
   return NO;
 }
 
 - (BOOL)isPromoActive {
   return NO;
 }
 
 @end