Creat BrowsingDataCookieHelper and CannedBrowsingDataCookieHelper for logging cookies at UI thread.

net/base/cookie_monster.h

Index: net/base/cookie_monster.h
===================================================================
--- net/base/cookie_monster.h	(revision 96178)
+++ net/base/cookie_monster.h	(working copy)
@@ -617,6 +617,12 @@
 
   // Supports the default copy constructor.
 
+  // Creates a canonical cookie from parsed cookie.
+  // Canonicalizes and validates inputs.  May return NULL if an attribute
+  // value is invalid.
+  static CanonicalCookie* Create(const GURL& url,
+                                 const ParsedCookie& pc);
+
   // Creates a canonical cookie from unparsed attribute values.
   // Canonicalizes and validates inputs.  May return NULL if an attribute
   // value is invalid.