Add --use-more-webui runtime flag to toggle WebUI replacements for native dialogs.

chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm
index b780784850d98d35311357c755ad6ad6e9c1726b..6a54544ee4c775b06648c01b8d533053a7bcf6e2 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_editor_base_controller.mm
@@ -60,11 +60,11 @@
 
 // static; implemented for each platform.  Update this function for new
 // classes derived from BookmarkEditorBaseController.
-void BookmarkEditor::Show(gfx::NativeWindow parent_hwnd,
-                          Profile* profile,
-                          const BookmarkNode* parent,
-                          const EditDetails& details,
-                          Configuration configuration) {
+void BookmarkEditor::ShowNative(gfx::NativeWindow parent_hwnd,
+                                Profile* profile,
+                                const BookmarkNode* parent,
+                                const EditDetails& details,
+                                Configuration configuration) {
   BookmarkEditorBaseController* controller = nil;
   if (details.type == EditDetails::NEW_FOLDER) {
     controller = [[BookmarkAllTabsController alloc]