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

chrome/common/extensions/extension_file_util_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 "chrome/common/extensions/extension_file_util.h"
 
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/path_service.h"
@@ skipping 286 matching lines @@
       " For the path " << actual_path.value();
     EXPECT_EQ(expected_path.value(), actual_path.value()) <<
       " For the path " << url;
   }
 }
 
 TEST_F(ExtensionFileUtilTest, ExtensionResourceURLToFilePath) {
   // Setup filesystem for testing.
   base::FilePath root_path;
   ASSERT_TRUE(file_util::CreateNewTempDirectory(
-        FILE_PATH_LITERAL(""), &root_path));
+      base::FilePath::StringType(), &root_path));
   ASSERT_TRUE(file_util::AbsolutePath(&root_path));
 
   base::FilePath api_path = root_path.Append(FILE_PATH_LITERAL("apiname"));
   ASSERT_TRUE(file_util::CreateDirectory(api_path));
 
   const char data[] = "Test Data";
   base::FilePath resource_path = api_path.Append(FILE_PATH_LITERAL("test.js"));
   ASSERT_TRUE(file_util::WriteFile(resource_path, data, sizeof(data)));
   resource_path = api_path.Append(FILE_PATH_LITERAL("escape spaces.js"));
   ASSERT_TRUE(file_util::WriteFile(resource_path, data, sizeof(data)));
@@ skipping 275 matching lines @@
   scoped_refptr<Extension> extension3(extension_file_util::LoadExtension(
       ext_dir, Manifest::UNPACKED, Extension::NO_FLAGS, &error));
   EXPECT_TRUE(extension3 == NULL);
   EXPECT_STREQ("Could not load icon 'icon.png' for page action.",
       error.c_str());
 }
 
 // TODO(aa): More tests as motivation allows. Maybe steal some from
 // ExtensionService? Many of them could probably be tested here without the
 // MessageLoop shenanigans.