Avoid conversion of index to BookmarkNode pointer unnacessarily.

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

 // Copyright (c) 2012 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_bar_controller.h"
 
 #include "base/mac/bundle_locations.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 2467 matching lines @@
 - (BOOL)canDragBookmarkButtonToTrash:(BookmarkButton*)button {
   return [self canEditBookmarks] &&
          [self canEditBookmark:[button bookmarkNode]];
 }
 
 - (void)didDragBookmarkToTrash:(BookmarkButton*)button {
   if ([self canDragBookmarkButtonToTrash:button]) {
     const BookmarkNode* node = [button bookmarkNode];
     if (node) {
       const BookmarkNode* parent = node->parent();
-      bookmarkModel_->Remove(parent,
-                             parent->GetIndexOf(node));
+      bookmarkModel_->Remove(parent, node);
     }
   }
 }
 
 - (void)bookmarkDragDidEnd:(BookmarkButton*)button
                  operation:(NSDragOperation)operation {
   [button setHidden:NO];
   [self resetAllButtonPositionsWithAnimation:YES];
 }
 
@@ skipping 405 matching lines @@
 - (id<BookmarkButtonControllerProtocol>)controllerForNode:
     (const BookmarkNode*)node {
   // See if it's in the bar, then if it is in the hierarchy of visible
   // folder menus.
   if (bookmarkModel_->bookmark_bar_node() == node)
     return self;
   return [folderController_ controllerForNode:node];
 }
 
 @end