[ios] Make “Choose folder” respect dynamic type

Image: https://drive.google.com/open?id=1fxpVgLqHb4-5oUCU1pMVJbGjUhrheQSf
On 10.3.1: https://drive.google.com/open?id=1xaO4Ja8WZbvjRvT1lQXccBkTfBFiECqE

Bug: 891279
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: I13ac8525ebc6108f0e2e064c424d7e8762435694
Reviewed-on: https://chromium-review.googlesource.com/c/1257792
Commit-Queue: David Jean <djean@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596539}

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

@@ -27,8 +27,8 @@
 
 namespace {
 
-// The height of every folder cell.
-const CGFloat kFolderCellHeight = 48.0;
+// The estimated height of every folder cell.
+const CGFloat kEstimatedFolderCellHeight = 48.0;
 
 // Height of section headers/footers.
 const CGFloat kSectionHeaderHeight = 8.0;
@@ -177,6 +177,9 @@ using bookmarks::BookmarkNode;
   // Add a tableFooterView in order to disable separators at the bottom of the
   // tableView.
   self.tableView.tableFooterView = [[UIView alloc] init];
+
+  self.tableView.estimatedRowHeight = kEstimatedFolderCellHeight;
+  self.tableView.rowHeight = UITableViewAutomaticDimension;
 }
 
 - (void)viewWillAppear:(BOOL)animated {
@@ -203,11 +206,6 @@ using bookmarks::BookmarkNode;
 
 #pragma mark - UITableViewDelegate
 
-- (CGFloat)tableView:(UITableView*)tableView
-    heightForRowAtIndexPath:(NSIndexPath*)indexPath {
-  return kFolderCellHeight;
-}
-
 - (CGFloat)tableView:(UITableView*)tableView
     heightForHeaderInSection:(NSInteger)section {
   return kSectionHeaderHeight;