Rewrite std::string("") to std::string(), Linux edition.

chrome/browser/sync/profile_sync_service_bookmark_unittest.cc

Index: chrome/browser/sync/profile_sync_service_bookmark_unittest.cc
diff --git a/chrome/browser/sync/profile_sync_service_bookmark_unittest.cc b/chrome/browser/sync/profile_sync_service_bookmark_unittest.cc
index bc62c97a0ff6a688d7b21489f51043203986370e..1ad62a12622555fd1daec66c35bb4554d49a245c 100644
--- a/chrome/browser/sync/profile_sync_service_bookmark_unittest.cc
+++ b/chrome/browser/sync/profile_sync_service_bookmark_unittest.cc
@@ -706,9 +706,9 @@ TEST_F(ProfileSyncServiceBookmarkTest, ServerChangeProcessing) {
       "'about:blank','gnotesWin','location=0,menubar=0," \
       "scrollbars=0,status=0,toolbar=0,width=300," \
       "height=300,resizable');});");
-  adds.AddURL(L"", javascript_url, other_bookmarks_id(), 0);
-  int64 u6 = adds.AddURL(L"Sync1", "http://www.syncable.edu/",
-                         mobile_bookmarks_id(), 0);
+  adds.AddURL(std::wstring(), javascript_url, other_bookmarks_id(), 0);
+  int64 u6 = adds.AddURL(
+      L"Sync1", "http://www.syncable.edu/", mobile_bookmarks_id(), 0);
 
   syncer::ChangeRecordList::const_iterator it;
   // The bookmark model shouldn't yet have seen any of the nodes of |adds|.