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

ui/base/gtk/menu_label_accelerator_util.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 "ui/base/gtk/menu_label_accelerator_util.h"
 
 #include "base/string_util.h"
 
 namespace {
 
@@ skipping 28 matching lines @@
 
 }  // namespace
 
 namespace ui {
 
 std::string ConvertAcceleratorsFromWindowsStyle(const std::string& label) {
   return ConvertAmpersandsTo(label, "_");
 }
 
 std::string RemoveWindowsStyleAccelerators(const std::string& label) {
-  return ConvertAmpersandsTo(label, "");
+  return ConvertAmpersandsTo(label, std::string());
 }
 
 // Replaces all ampersands in |label| with two ampersands. This effectively
 // escapes strings for later processing by ConvertAmpersandsTo(), so that
 // ConvertAmpersandsTo(EscapeWindowsStyleAccelerators(x), *) is |x| with
 // underscores doubled, making the string that appears to the user just |x|.
 std::string EscapeWindowsStyleAccelerators(const std::string& label) {
   std::string ret;
   ReplaceChars(label, "&", "&&", &ret);
   return ret;
 }
 
 }  // namespace ui