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

chrome/browser/policy/policy_prefs_browsertest.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 <algorithm>
 #include <map>
 #include <sstream>
 #include <string>
 #include <vector>
 
@@ skipping 501 matching lines @@
     if (indicator_selector.empty())
       indicator_selector = "[pref=\"" + (*pref_mapping)->pref() + "\"]";
     for (ScopedVector<IndicatorTestCase>::const_iterator
              indicator_test_case = indicator_test_cases.begin();
          indicator_test_case != indicator_test_cases.end();
          ++indicator_test_case) {
       // Check that no controlled setting indicator is visible when no value is
       // set by policy.
       PolicyMap policies;
       UpdateProviderPolicy(policies);
-      VerifyControlledSettingIndicators(browser(), indicator_selector,
-                                        "", "", false);
+      VerifyControlledSettingIndicators(
+          browser(), indicator_selector, std::string(), std::string(), false);
       // Check that the appropriate controlled setting indicator is shown when a
       // value is enforced by policy.
       policies.LoadFrom(&(*indicator_test_case)->policy(),
                         POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER);
       UpdateProviderPolicy(policies);
       VerifyControlledSettingIndicators(browser(), indicator_selector,
                                         (*indicator_test_case)->value(),
                                         "policy",
                                         (*indicator_test_case)->readonly());
 
@@ skipping 32 matching lines @@
   }
 }
 
 INSTANTIATE_TEST_CASE_P(
     PolicyPrefsTestInstance,
     PolicyPrefsTest,
     testing::ValuesIn(GetChromePolicyDefinitionList()->begin,
                       GetChromePolicyDefinitionList()->end));
 
 }  // namespace policy