Initial implementation of Cookie service.

net/cookies/cookie_store.h

Index: net/cookies/cookie_store.h
diff --git a/net/cookies/cookie_store.h b/net/cookies/cookie_store.h
index 1a4d3d47ed558f0653a418ed381077f0aa06e05d..461f607cd11d806769a62866e3831f18ece74d7c 100644
--- a/net/cookies/cookie_store.h
+++ b/net/cookies/cookie_store.h
@@ -42,7 +42,7 @@ class NET_EXPORT CookieStore {
     // The following four values have the same meaning as EXPLICIT, but are
     // being used to track down where a bug is coming from.
     // TODO(nharper): Remove the following four values once the one of interest
-    // has been found.
+    // has been found.  See http://crbug.com/548423.
     EXPLICIT_DELETE_BETWEEN,
     EXPLICIT_DELETE_PREDICATE,
     EXPLICIT_DELETE_SINGLE,
@@ -202,9 +202,11 @@ class NET_EXPORT CookieStore {
 
   // Deletes all of the cookies that match the given predicate and that have a
   // creation_date greater than or equal to |delete_begin| and smaller than
-  // |delete_end|. This includes all http_only and secure cookies. Avoid
-  // deleting cookies that could leave websites with a partial set of visible
-  // cookies.
+  // |delete_end|. Null times do not cap their ranges (i.e.
+  // |delete_end.is_null()| would mean that there is no time after which
+  // cookies are not deleted).  This includes all http_only and secure
+  // cookies. Avoid deleting cookies that could leave websites with a
+  // partial set of visible cookies.
   // Calls |callback| with the number of cookies deleted.
   virtual void DeleteAllCreatedBetweenWithPredicateAsync(
       const base::Time& delete_begin,