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

net/cookies/canonical_cookie_unittest.cc

Index: net/cookies/canonical_cookie_unittest.cc
diff --git a/net/cookies/canonical_cookie_unittest.cc b/net/cookies/canonical_cookie_unittest.cc
index d7c25d188a6e4ff020b730030925f41d1dc40a14..161b27f3db669cceffd0f687ca36d38302d7fdc7 100644
--- a/net/cookies/canonical_cookie_unittest.cc
+++ b/net/cookies/canonical_cookie_unittest.cc
@@ -55,8 +55,16 @@ TEST(CanonicalCookieTest, Constructor) {
   EXPECT_EQ("/test", cookie.Path());
   EXPECT_FALSE(cookie.IsSecure());
 
-  CanonicalCookie cookie2(url, "A", "2", "", "", current_time, base::Time(),
-                          current_time, false, false);
+  CanonicalCookie cookie2(url,
+                          "A",
+                          "2",
+                          std::string(),
+                          std::string(),
+                          current_time,
+                          base::Time(),
+                          current_time,
+                          false,
+                          false);
   EXPECT_EQ(url.GetOrigin().spec(), cookie.Source());
   EXPECT_EQ("A", cookie2.Name());
   EXPECT_EQ("2", cookie2.Value());
@@ -287,7 +295,7 @@ TEST(CanonicalCookieTest, IsOnPath) {
   EXPECT_TRUE(cookie->IsOnPath("/test/bar.html"));
 
   // Test the empty string edge case.
-  EXPECT_FALSE(cookie->IsOnPath(""));
+  EXPECT_FALSE(cookie->IsOnPath(std::string()));
 
   cookie.reset(
       CanonicalCookie::Create(GURL("http://www.example.com/test/foo.html"),