bookmarks: Simplify is_permanent_node() implementation.

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

 // Copyright (c) 2011 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 "chrome/browser/ui/cocoa/bookmarks/bookmark_bubble_controller.h"
 
 #include "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_button.h"
@@ skipping 360 matching lines @@
 + (NSString*)chooseAnotherFolderString {
   return l10n_util::GetNSStringWithFixup(
       IDS_BOOMARK_BUBBLE_CHOOSER_ANOTHER_FOLDER);
 }
 
 // For the given folder node, walk the tree and add folder names to
 // the given pop up button.
 - (void)addFolderNodes:(const BookmarkNode*)parent
          toPopUpButton:(NSPopUpButton*)button
            indentation:(int)indentation {
-  if (!model_->is_root(parent))  {
+  if (!model_->is_root_node(parent))  {
     NSString* title = base::SysUTF16ToNSString(parent->GetTitle());
     NSMenu* menu = [button menu];
     NSMenuItem* item = [menu addItemWithTitle:title
                                        action:NULL
                                 keyEquivalent:@""];
     [item setRepresentedObject:[NSValue valueWithPointer:parent]];
     [item setIndentationLevel:indentation];
     ++indentation;
   }
   for (int i = 0; i < parent->child_count(); i++) {
@@ skipping 20 matching lines @@
   NSInteger idx = [menu indexOfItemWithRepresentedObject:parentValue];
   DCHECK(idx != -1);
   [folderPopUpButton_ selectItemAtIndex:idx];
 }
 
 - (NSPopUpButton*)folderPopUpButton {
   return folderPopUpButton_;
 }
 
 @end  // implementation BookmarkBubbleController(ExposedForUnitTesting)