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

chrome/browser/predictors/autocomplete_action_predictor.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/predictors/autocomplete_action_predictor.h"
 
 #include <math.h>
 
 #include <vector>
 
@@ skipping 130 matching lines @@
     const content::SessionStorageNamespaceMap& session_storage_namespace_map,
     const gfx::Size& size) {
   // Only cancel the old prerender after starting the new one, so if the URLs
   // are the same, the underlying prerender will be reused.
   scoped_ptr<prerender::PrerenderHandle> old_prerender_handle(
       prerender_handle_.release());
   if (prerender::PrerenderManager* prerender_manager =
           prerender::PrerenderManagerFactory::GetForProfile(profile_)) {
     content::SessionStorageNamespace* session_storage_namespace = NULL;
     content::SessionStorageNamespaceMap::const_iterator it =
-        session_storage_namespace_map.find("");
+        session_storage_namespace_map.find(std::string());
     if (it != session_storage_namespace_map.end())
       session_storage_namespace = it->second;
     prerender_handle_.reset(
         prerender_manager->AddPrerenderFromOmnibox(
             url, session_storage_namespace, size));
   }
   if (old_prerender_handle)
     old_prerender_handle->OnCancel();
 }
 
@@ skipping 415 matching lines @@
   return number_of_hits / (number_of_hits + value.number_of_misses);
 }
 
 AutocompleteActionPredictor::TransitionalMatch::TransitionalMatch() {
 }
 
 AutocompleteActionPredictor::TransitionalMatch::~TransitionalMatch() {
 }
 
 }  // namespace predictors