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

chrome/browser/extensions/api/storage/settings_sync_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.
 
 #include "base/bind.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
@@ skipping 112 matching lines @@
     SettingSyncDataList matching_changes;
     for (SettingSyncDataList::iterator it = changes_.begin();
         it != changes_.end(); ++it) {
       if (it->extension_id() == extension_id && it->key() == key) {
         matching_changes.push_back(*it);
       }
     }
     if (matching_changes.empty()) {
       ADD_FAILURE() << "No matching changes for " << extension_id << "/" <<
           key << " (out of " << changes_.size() << ")";
-      return SettingSyncData(
-          syncer::SyncChange::ACTION_INVALID, "", "",
-          scoped_ptr<Value>(new DictionaryValue()));
+      return SettingSyncData(syncer::SyncChange::ACTION_INVALID,
+                             std::string(),
+                             std::string(),
+                             scoped_ptr<Value>(new DictionaryValue()));
     }
     if (matching_changes.size() != 1u) {
       ADD_FAILURE() << matching_changes.size() << " matching changes for " <<
            extension_id << "/" << key << " (out of " << changes_.size() << ")";
     }
     return matching_changes[0];
   }
 
  private:
   SettingSyncDataList changes_;
@@ skipping 1271 matching lines @@
     ASSERT_EQ(1u, sync_processor_->changes().size());
     SettingSyncData sync_data = sync_processor_->changes()[0];
     EXPECT_EQ(syncer::SyncChange::ACTION_ADD, sync_data.change_type());
     EXPECT_EQ("ext", sync_data.extension_id());
     EXPECT_EQ("key.with.spot", sync_data.key());
     EXPECT_TRUE(sync_data.value().Equals(string_value.get()));
   }
 }
 
 }  // namespace extensions