Revert of [ObjC ARC] Converts ios/chrome/browser/ui/bookmarks:bookmarks_arc_2 to ARC.

ios/chrome/browser/ui/bookmarks/BUILD.gn

Index: ios/chrome/browser/ui/bookmarks/BUILD.gn
diff --git a/ios/chrome/browser/ui/bookmarks/BUILD.gn b/ios/chrome/browser/ui/bookmarks/BUILD.gn
index f0d473fc71e60facc81c5addce90b74dd7a7eb91..bbe8c4ec94339b3798daa4c686d5df55945fb5fb 100644
--- a/ios/chrome/browser/ui/bookmarks/BUILD.gn
+++ b/ios/chrome/browser/ui/bookmarks/BUILD.gn
@@ -5,28 +5,6 @@
 source_set("bookmarks_arc") {
   configs += [ "//build/config/compiler:enable_arc" ]
   sources = [
-    "bookmark_collection_cells.h",
-    "bookmark_collection_cells.mm",
-    "bookmark_collection_view.h",
-    "bookmark_collection_view.mm",
-    "bookmark_collection_view_background.h",
-    "bookmark_collection_view_background.mm",
-    "bookmark_controller_factory.h",
-    "bookmark_controller_factory.mm",
-    "bookmark_edit_view_controller.h",
-    "bookmark_edit_view_controller.mm",
-    "bookmark_elevated_toolbar.h",
-    "bookmark_elevated_toolbar.mm",
-    "bookmark_extended_button.h",
-    "bookmark_extended_button.mm",
-    "bookmark_folder_collection_view.h",
-    "bookmark_folder_collection_view.mm",
-    "bookmark_folder_editor_view_controller.h",
-    "bookmark_folder_editor_view_controller.mm",
-    "bookmark_folder_table_view_cell.h",
-    "bookmark_folder_table_view_cell.mm",
-    "bookmark_folder_view_controller.h",
-    "bookmark_folder_view_controller.mm",
     "bookmark_home_handset_view_controller.h",
     "bookmark_home_handset_view_controller.mm",
     "bookmark_home_tablet_ntp_controller.h",
@@ -95,6 +73,28 @@
 
 source_set("bookmarks") {
   sources = [
+    "bookmark_collection_cells.h",
+    "bookmark_collection_cells.mm",
+    "bookmark_collection_view.h",
+    "bookmark_collection_view.mm",
+    "bookmark_collection_view_background.h",
+    "bookmark_collection_view_background.mm",
+    "bookmark_controller_factory.h",
+    "bookmark_controller_factory.mm",
+    "bookmark_edit_view_controller.h",
+    "bookmark_edit_view_controller.mm",
+    "bookmark_elevated_toolbar.h",
+    "bookmark_elevated_toolbar.mm",
+    "bookmark_extended_button.h",
+    "bookmark_extended_button.mm",
+    "bookmark_folder_collection_view.h",
+    "bookmark_folder_collection_view.mm",
+    "bookmark_folder_editor_view_controller.h",
+    "bookmark_folder_editor_view_controller.mm",
+    "bookmark_folder_table_view_cell.h",
+    "bookmark_folder_table_view_cell.mm",
+    "bookmark_folder_view_controller.h",
+    "bookmark_folder_view_controller.mm",
     "bookmark_home_primary_view.h",
     "bookmark_home_view_controller.h",
     "bookmark_home_view_controller.mm",