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

chrome/browser/extensions/api/identity/identity_apitest.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 "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/api/identity/identity_api.h"
 #include "chrome/browser/extensions/api/identity/web_auth_flow.h"
 #include "chrome/browser/extensions/extension_apitest.h"
@@ skipping 490 matching lines @@
     EXPECT_EQ(expected_y, web_auth_flow_browser->override_bounds().y());
     EXPECT_EQ(expected_width, web_auth_flow_browser->override_bounds().width());
     EXPECT_EQ(
         expected_height, web_auth_flow_browser->override_bounds().height());
 
     web_auth_flow_browser->window()->Close();
   }
 };
 
 IN_PROC_BROWSER_TEST_F(LaunchWebAuthFlowFunctionTest, Bounds) {
-  RunAndCheckBounds("", 0, 0, 0, 0);
+  RunAndCheckBounds(std::string(), 0, 0, 0, 0);
   RunAndCheckBounds("\"width\": 100, \"height\": 200", 0, 0, 100, 200);
   RunAndCheckBounds("\"left\": 100, \"top\": 200", 100, 200, 0, 0);
   RunAndCheckBounds(
       "\"left\": 100, \"top\": 200, \"width\": 300, \"height\": 400",
       100, 200, 300, 400);
 }
 
 }  // namespace extensions