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

extensions/common/extension_resource_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 <algorithm>
 
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "extensions/common/constants.h"
@@ skipping 113 matching lines @@
   base::FilePath root_resource = temp.path().AppendASCII(filename);
   std::string data = "some foo";
   ASSERT_TRUE(file_util::WriteFile(root_resource, data.c_str(), data.length()));
 
   // Create l10n resources (for current locale and its parents).
   base::FilePath l10n_path =
       temp.path().Append(kLocaleFolder);
   ASSERT_TRUE(file_util::CreateDirectory(l10n_path));
 
   std::vector<std::string> locales;
-  l10n_util::GetParentLocales(l10n_util::GetApplicationLocale(""), &locales);
+  l10n_util::GetParentLocales(l10n_util::GetApplicationLocale(std::string()),
+                              &locales);
   ASSERT_FALSE(locales.empty());
   for (size_t i = 0; i < locales.size(); i++) {
     base::FilePath make_path;
     make_path = l10n_path.AppendASCII(locales[i]);
     ASSERT_TRUE(file_util::CreateDirectory(make_path));
     ASSERT_TRUE(file_util::WriteFile(make_path.AppendASCII(filename),
         data.c_str(), data.length()));
   }
 
   base::FilePath path;
   std::string extension_id = id_util::GenerateId("test");
   ExtensionResource resource(extension_id, temp.path(),
                              base::FilePath().AppendASCII(filename));
   base::FilePath resolved_path = resource.GetFilePath();
 
   base::FilePath expected_path;
   // Expect default path only, since fallback logic is disabled.
   // See http://crbug.com/27359.
   expected_path = root_resource;
   ASSERT_TRUE(file_util::AbsolutePath(&expected_path));
 
   EXPECT_EQ(ToLower(expected_path.value()), ToLower(resolved_path.value()));
   EXPECT_EQ(ToLower(temp.path().value()),
             ToLower(resource.extension_root().value()));
   EXPECT_EQ(ToLower(base::FilePath().AppendASCII(filename).value()),
             ToLower(resource.relative_path().value()));
 }
 
 }  // namespace extensions