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

chrome/test/chromedriver/chromedriver_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 <list>
 #include <string>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/json/json_reader.h"
@@ skipping 146 matching lines @@
     ASSERT_TRUE(dict->GetInteger("status", &status));
     std::string value_str;
     ASSERT_TRUE(dict->GetString("value", &value_str));
     EXPECT_STREQ("stuff", value_str.c_str());
     EXPECT_EQ(kOk, status);
   }
   {
     base::DictionaryValue params;
     scoped_ptr<base::Value> value(base::Value::CreateNullValue());
     mock->Expect(scoped_ptr<ExpectedCommand>(new ExpectedCommand(
-        "quitAll", params, "", kOk, value.Pass(), "")));
+        "quitAll", params, std::string(), kOk, value.Pass(), std::string())));
   }
   Shutdown();
 }