Reduce the memory usage of bookmarks storage

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

 // 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.
 
 #include "chrome/browser/sync/test/integration/bookmarks_helper.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <set>
@@ skipping 215 matching lines @@
       urls_with_favicons_->find(node->url()) == urls_with_favicons_->end()) {
     return FaviconData();
   }
   // If a favicon was explicitly set, we may need to wait for it to be loaded
   // via BookmarkModel::GetFavicon(), which is an asynchronous operation.
   if (!node->is_favicon_loaded()) {
     FaviconChangeObserver observer(model, node);
     model->GetFavicon(node);
     observer.WaitForGetFavicon();
   }
-  return FaviconData(model->GetFavicon(node), node->icon_url());
+  return FaviconData(model->GetFavicon(node),
+                     node->icon_url() ? *node->icon_url() : GURL());
 }
 
 // Sets the favicon for |profile| and |node|. |profile| may be
 // |test()->verifier()|.
 void SetFaviconImpl(Profile* profile,
                     const BookmarkNode* node,
                     const GURL& icon_url,
                     const gfx::Image& image,
                     bookmarks_helper::FaviconSource favicon_source) {
   BookmarkModel* model = BookmarkModelFactory::GetForBrowserContext(profile);
@@ skipping 706 matching lines @@
 }  // namespace
 
 BookmarksUrlChecker::BookmarksUrlChecker(int profile,
                                          const GURL& url,
                                          int expected_count)
     : AwaitMatchStatusChangeChecker(base::Bind(BookmarkCountsByUrlMatch,
                                                profile,
                                                base::ConstRef(url),
                                                expected_count),
                                     "Bookmark URL counts match.") {}