bookmarks: Move BookmarkNode into 'bookmarks' namespace.

chrome/browser/sync/test/integration/bookmarks_helper.cc

Index: chrome/browser/sync/test/integration/bookmarks_helper.cc
diff --git a/chrome/browser/sync/test/integration/bookmarks_helper.cc b/chrome/browser/sync/test/integration/bookmarks_helper.cc
index eae9c43b0ae03f5671cd7b2a222cdd30ead9f563..035d3c2655e2e0bf99ec9abbf876aa58af5e44d7 100644
--- a/chrome/browser/sync/test/integration/bookmarks_helper.cc
+++ b/chrome/browser/sync/test/integration/bookmarks_helper.cc
@@ -4,6 +4,9 @@
 
 #include "chrome/browser/sync/test/integration/bookmarks_helper.h"
 
+#include <set>
+#include <vector>
+
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_util.h"
@@ -43,6 +46,7 @@
 #include "ui/gfx/image/image_skia.h"
 
 using bookmarks::BookmarkModel;
+using bookmarks::BookmarkNode;
 
 namespace {