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

chrome/browser/extensions/isolated_app_browsertest.cc

Index: chrome/browser/extensions/isolated_app_browsertest.cc
diff --git a/chrome/browser/extensions/isolated_app_browsertest.cc b/chrome/browser/extensions/isolated_app_browsertest.cc
index b7717bb9f1834a6173c8a79f468d9801e0e3e6a6..ec55a4c122327db80a997727ce6acaf94cff3d25 100644
--- a/chrome/browser/extensions/isolated_app_browsertest.cc
+++ b/chrome/browser/extensions/isolated_app_browsertest.cc
@@ -328,7 +328,7 @@ IN_PROC_BROWSER_TEST_F(IsolatedAppTest, MAYBE_SubresourceCookieIsolation) {
 
   // The app under test acts on URLs whose host is "localhost",
   // so the URLs we navigate to must have host "localhost".
-  GURL root_url = test_server()->GetURL("");
+  GURL root_url = test_server()->GetURL(std::string());
   GURL base_url = test_server()->GetURL("files/extensions/isolated_apps/");
   GURL::Replacements replace_host;
   std::string host_str("localhost");  // Must stay in scope with replace_host.