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

chrome/common/extensions/manifest_tests/extension_manifest_test.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/manifest_tests/extension_manifest_test.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/path_service.h"
@@ skipping 199 matching lines @@
 ExtensionManifestTest::Testcase::Testcase(std::string manifest_filename,
                                           std::string expected_error)
     : manifest_filename_(manifest_filename),
       expected_error_(expected_error),
       location_(extensions::Manifest::INTERNAL),
       flags_(Extension::NO_FLAGS) {
 }
 
 ExtensionManifestTest::Testcase::Testcase(std::string manifest_filename)
     : manifest_filename_(manifest_filename),
-      expected_error_(""),
       location_(extensions::Manifest::INTERNAL),
-      flags_(Extension::NO_FLAGS) {
-}
+      flags_(Extension::NO_FLAGS) {}
 
 ExtensionManifestTest::Testcase::Testcase(
     std::string manifest_filename,
     extensions::Manifest::Location location,
     int flags)
     : manifest_filename_(manifest_filename),
-      expected_error_(""),
       location_(location),
-      flags_(flags) {
-}
+      flags_(flags) {}
 
 void ExtensionManifestTest::RunTestcases(const Testcase* testcases,
                                          size_t num_testcases,
                                          EXPECT_TYPE type) {
   switch (type) {
     case EXPECT_TYPE_ERROR:
       for (size_t i = 0; i < num_testcases; ++i) {
         LoadAndExpectError(testcases[i].manifest_filename_.c_str(),
                            testcases[i].expected_error_,
                            testcases[i].location_,
@@ skipping 10 matching lines @@
       break;
     case EXPECT_TYPE_SUCCESS:
       for (size_t i = 0; i < num_testcases; ++i) {
         LoadAndExpectSuccess(testcases[i].manifest_filename_.c_str(),
                              testcases[i].location_,
                              testcases[i].flags_);
       }
       break;
    }
 }