Move BookmarkNodeData into bookmarks namespace.

components/bookmarks/browser/bookmark_node_data_mac.cc

 // Copyright 2014 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/bookmarks/browser/bookmark_node_data.h"
 
 #include "components/bookmarks/browser/bookmark_pasteboard_helper_mac.h"
 
+namespace bookmarks {
+
 // static
 bool BookmarkNodeData::ClipboardContainsBookmarks() {
   return PasteboardContainsBookmarks(ui::CLIPBOARD_TYPE_COPY_PASTE);
 }
 
 void BookmarkNodeData::WriteToClipboard(ui::ClipboardType type) {
   WriteBookmarksToPasteboard(type, elements, profile_path_);
 }
 
 bool BookmarkNodeData::ReadFromClipboard(ui::ClipboardType type) {
   base::FilePath file_path;
   if (ReadBookmarksFromPasteboard(type, elements, &file_path)) {
     profile_path_ = file_path;
     return true;
   }
 
   return false;
 }
+
+}  // namespace bookmarks