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

chrome/common/extensions/permissions/socket_permission_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 <string>
 
 #include "base/pickle.h"
 #include "base/values.h"
 #include "chrome/common/extensions/extension_unittest.h"
 #include "chrome/common/extensions/permissions/socket_permission.h"
@@ skipping 30 matching lines @@
   CHECK(data1.ParseForTest("tcp-connect"));
   CHECK(data2.ParseForTest("tcp-connect:www.example.com"));
 
   EXPECT_FALSE(data1 == data2);
   EXPECT_TRUE(data1 < data2);
 }
 
 TEST_F(SocketPermissionTest, Parse) {
   SocketPermissionData data;
 
-  EXPECT_FALSE(data.ParseForTest(""));
+  EXPECT_FALSE(data.ParseForTest(std::string()));
   EXPECT_FALSE(data.ParseForTest("*"));
   EXPECT_FALSE(data.ParseForTest("\00\00*"));
   EXPECT_FALSE(data.ParseForTest("\01*"));
   EXPECT_FALSE(data.ParseForTest("tcp-connect:www.example.com:-1"));
   EXPECT_FALSE(data.ParseForTest("tcp-connect:www.example.com:65536"));
   EXPECT_FALSE(data.ParseForTest("tcp-connect:::"));
   EXPECT_FALSE(data.ParseForTest("tcp-connect::0"));
   EXPECT_FALSE(data.ParseForTest("tcp-connect:  www.exmaple.com:  99  "));
   EXPECT_FALSE(data.ParseForTest("tcp-connect:*.exmaple.com :99"));
   EXPECT_FALSE(data.ParseForTest("tcp-connect:*.exmaple.com: 99"));
@@ skipping 199 matching lines @@
 
   scoped_ptr<base::Value> vtmp(permission1->ToValue());
   ASSERT_TRUE(vtmp);
   ASSERT_TRUE(permission2->FromValue(vtmp.get()));
   EXPECT_TRUE(permission1->Equal(permission2.get()));
 }
 
 }  // namespace
 
 }  // namespace extensions