Creat BrowsingDataCookieHelper and CannedBrowsingDataCookieHelper for logging cookies at UI thread.

net/base/cookie_monster.cc

Index: net/base/cookie_monster.cc
===================================================================
--- net/base/cookie_monster.cc	(revision 93449)
+++ net/base/cookie_monster.cc	(working copy)
@@ -2117,11 +2117,9 @@
   if (pc.HasDomain()) {
     domain_string = pc.Domain();
   }
-  bool result
-      = GetCookieDomainWithString(url, domain_string,
+  GetCookieDomainWithString(url, domain_string,
                                   &cookie_domain);
   // Caller is responsible for passing in good arguments.
-  DCHECK(result);
   domain_ = cookie_domain;
 }