[Sync] Replacing NULL with nullptr/null throughout sync code.

components/sync_bookmarks/bookmark_model_associator.cc

 // Copyright 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.
 
 #include "components/sync_bookmarks/bookmark_model_associator.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 56 matching lines @@
 const int kTitleLimitBytes = 255;
 
 // Provides the following abstraction: given a parent bookmark node, find best
 // matching child node for many sync nodes.
 class BookmarkNodeFinder {
  public:
   // Creates an instance with the given parent bookmark node.
   explicit BookmarkNodeFinder(const BookmarkNode* parent_node);
 
   // Finds the bookmark node that matches the given url, title and folder
-  // attribute. Returns the matching node if one exists; NULL otherwise.
+  // attribute. Returns the matching node if one exists; null otherwise.
   // If there are multiple matches then a node with ID matching |preferred_id|
   // is returned; otherwise the first matching node is returned.
   // If a matching node is found, it's removed for further matches.
   const BookmarkNode* FindBookmarkNode(const GURL& url,
                                        const std::string& title,
                                        bool is_folder,
                                        int64_t preferred_id);
 
   // Returns true if |bookmark_node| matches the specified |url|,
   // |title|, and |is_folder| flags.
@@ skipping 245 matching lines @@
 }
 
 int64_t BookmarkModelAssociator::GetSyncIdFromChromeId(const int64_t& node_id) {
   BookmarkIdToSyncIdMap::const_iterator iter = id_map_.find(node_id);
   return iter == id_map_.end() ? syncer::kInvalidId : iter->second;
 }
 
 const BookmarkNode* BookmarkModelAssociator::GetChromeNodeFromSyncId(
     int64_t sync_id) {
   SyncIdToBookmarkNodeMap::const_iterator iter = id_map_inverse_.find(sync_id);
-  return iter == id_map_inverse_.end() ? NULL : iter->second;
+  return iter == id_map_inverse_.end() ? nullptr : iter->second;
 }
 
 bool BookmarkModelAssociator::InitSyncNodeFromChromeId(
     const int64_t& node_id,
     syncer::BaseNode* sync_node) {
   DCHECK(sync_node);
   int64_t sync_id = GetSyncIdFromChromeId(node_id);
   if (sync_id == syncer::kInvalidId)
     return false;
   if (sync_node->InitByIdLookup(sync_id) != syncer::BaseNode::INIT_OK)
@@ skipping 653 matching lines @@
                                  syncer::BOOKMARKS);
       } else {
         context->set_native_model_sync_state(BEHIND);
       }
     }
   }
   return syncer::SyncError();
 }
 
 }  // namespace sync_bookmarks