Support domain=IPADDR if it matches the url ip address exactly.

net/base/cookie_monster_unittest.cc

Index: net/base/cookie_monster_unittest.cc
diff --git a/net/base/cookie_monster_unittest.cc b/net/base/cookie_monster_unittest.cc
index 1d5d9636133e595972cba215a120af87da0ba6bd..48843d10089a1a93753fd607a555f3a947893943 100644
--- a/net/base/cookie_monster_unittest.cc
+++ b/net/base/cookie_monster_unittest.cc
@@ -406,6 +406,12 @@ TEST(CookieMonsterTest, TestIpAddress) {
     EXPECT_FALSE(cm.SetCookie(url_ip, "b=2; domain=.1.2.3.4"));
     EXPECT_FALSE(cm.SetCookie(url_ip, "c=3; domain=.3.4"));
     EXPECT_EQ("", cm.GetCookies(url_ip));
+    // It should be allowed to set a cookie if domain= matches the IP address
+    // exactly.  This matches IE/Firefox, even though it seems a bit wrong.
+    EXPECT_FALSE(cm.SetCookie(url_ip, "b=2; domain=1.2.3.3"));
+    EXPECT_EQ("", cm.GetCookies(url_ip));
+    EXPECT_TRUE(cm.SetCookie(url_ip, "b=2; domain=1.2.3.4"));
+    EXPECT_EQ("b=2", cm.GetCookies(url_ip));
   }
 }