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

chrome/browser/sync/profile_sync_service_bookmark_unittest.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.
 
 // TODO(akalin): This file is basically just a unit test for
 // BookmarkChangeProcessor.  Write unit tests for
 // BookmarkModelAssociator separately.
 
 #include <map>
 #include <queue>
@@ skipping 688 matching lines @@
   int64 u3 = adds.AddURL(L"Nifty2", "ftp://nifty.andrew.cmu.edu/", f1, u2);
   // u4 is a duplicate title, different URL.
   adds.AddURL(L"Some old site", "http://slog.thestranger.com/",
               bookmark_bar_id(), u1);
   // u5 tests an empty-string title.
   std::string javascript_url(
       "javascript:(function(){var w=window.open(" \
       "'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|.
   for (it = adds.changes().begin(); it != adds.changes().end(); ++it)
     ExpectBrowserNodeUnknown(it->id);
 
   adds.ApplyPendingChanges(change_processor_.get());
 
   // Make sure the bookmark model received all of the nodes in |adds|.
   for (it = adds.changes().begin(); it != adds.changes().end(); ++it)
@@ skipping 1106 matching lines @@
             new_versions[changed_bookmark->id()]);
   initial_versions.erase(changed_bookmark->id());
   ExpectTransactionVersionMatch(model_->bookmark_bar_node(), initial_versions);
   ExpectTransactionVersionMatch(model_->other_node(), initial_versions);
   ExpectTransactionVersionMatch(model_->mobile_node(), initial_versions);
 }
 
 }  // namespace
 
 }  // namespace browser_sync