Reduce the memory usage of bookmarks storage

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 da2ab1c139a709a3cc71509beb0699a577dbb0ad..2db6549061c99034fcb76e487e2b5df35742d9e7 100644
--- a/chrome/browser/sync/test/integration/bookmarks_helper.cc
+++ b/chrome/browser/sync/test/integration/bookmarks_helper.cc
@@ -222,7 +222,7 @@ FaviconData GetFaviconData(BookmarkModel* model,
                            const BookmarkNode* node) {
   // If a favicon wasn't explicitly set for a particular URL, simply return its
   // blank favicon.
-  if (!urls_with_favicons_ ||
+  if (!urls_with_favicons_ || !node->icon_url() ||
       urls_with_favicons_->find(node->url()) == urls_with_favicons_->end()) {
     return FaviconData();
   }
@@ -233,7 +233,7 @@ FaviconData GetFaviconData(BookmarkModel* model,
     model->GetFavicon(node);
     observer.WaitForGetFavicon();
   }
-  return FaviconData(model->GetFavicon(node), node->icon_url());
+  return FaviconData(model->GetFavicon(node), *node->icon_url());
 }
 
 // Sets the favicon for |profile| and |node|. |profile| may be