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

chrome/browser/internal_auth_unittest.cc

Index: chrome/browser/internal_auth_unittest.cc
diff --git a/chrome/browser/internal_auth_unittest.cc b/chrome/browser/internal_auth_unittest.cc
index 42080cd33b5e151881946c38fe44c42e4f814a3a..da8954eb52a2fdcea0aca4550b0d817d1d4ef8aa 100644
--- a/chrome/browser/internal_auth_unittest.cc
+++ b/chrome/browser/internal_auth_unittest.cc
@@ -69,9 +69,10 @@ TEST_F(InternalAuthTest, BadGeneration) {
       token, long_string_, map));
 
   // Trying empty domain.
-  token = InternalAuthGeneration::GeneratePassport("", map);
+  token = InternalAuthGeneration::GeneratePassport(std::string(), map);
   ASSERT_TRUE(token.empty());
-  ASSERT_FALSE(InternalAuthVerification::VerifyPassport(token, "", map));
+  ASSERT_FALSE(
+      InternalAuthVerification::VerifyPassport(token, std::string(), map));
 
   std::string dummy("abcdefghij");
   for (size_t i = 1000; i--;) {
@@ -87,7 +88,7 @@ TEST_F(InternalAuthTest, BadGeneration) {
   ASSERT_FALSE(InternalAuthVerification::VerifyPassport(token, "zapata", map));
 
   map.clear();
-  map[""] = "value";
+  map[std::string()] = "value";
   // Trying empty key.
   token = InternalAuthGeneration::GeneratePassport("zapata", map);
   ASSERT_TRUE(token.empty());