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

chrome/browser/predictors/resource_prefetch_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/resource_prefetch_predictor.h"
 
 #include <map>
 #include <set>
 #include <utility>
 
@@ skipping 994 matching lines @@
     data_map->erase(key);
     BrowserThread::PostTask(
         BrowserThread::DB, FROM_HERE,
         base::Bind(&ResourcePrefetchPredictorTables::DeleteSingleDataPoint,
                    tables_,
                    key,
                    key_type));
   } else {
     bool is_host = key_type == PREFETCH_KEY_TYPE_HOST;
     PrefetchData empty_data(
-        !is_host ? PREFETCH_KEY_TYPE_HOST : PREFETCH_KEY_TYPE_URL , "");
+        !is_host ? PREFETCH_KEY_TYPE_HOST : PREFETCH_KEY_TYPE_URL,
+        std::string());
     const PrefetchData& host_data = is_host ? cache_entry->second : empty_data;
     const PrefetchData& url_data = is_host ? empty_data : cache_entry->second;
     BrowserThread::PostTask(
         BrowserThread::DB, FROM_HERE,
         base::Bind(&ResourcePrefetchPredictorTables::UpdateData,
                    tables_,
                    url_data,
                    host_data));
   }
 }
@@ skipping 212 matching lines @@
     RPP_PREDICTED_HISTOGRAM_PERCENTAGE(
         "PrefetchFromNetworkPercentOfTotalFromNetwork",
         prefetch_network * 100.0 / total_resources_fetched_from_network);
   }
 
 #undef RPP_PREDICTED_HISTOGRAM_PERCENTAGE
 #undef RPP_PREDICTED_HISTOGRAM_COUNTS
 }
 
 }  // namespace predictors