Add GetExpirationTimes() to HttpResponseHeader.

net/url_request/sdch_dictionary_fetcher.cc

Index: net/url_request/sdch_dictionary_fetcher.cc
diff --git a/net/url_request/sdch_dictionary_fetcher.cc b/net/url_request/sdch_dictionary_fetcher.cc
index e8eb3268e4a8db861a8cdf1ac5f759b1aa01729a..5bbcb90016c5c6931c83b955bd855490bb4e3acc 100644
--- a/net/url_request/sdch_dictionary_fetcher.cc
+++ b/net/url_request/sdch_dictionary_fetcher.cc
@@ -167,12 +167,13 @@ void SdchDictionaryFetcher::OnResponseStarted(URLRequest* request) {
   HttpResponseHeaders* response_headers = request->response_headers();
   int result = request->status().error();
   if (result == OK && response_headers) {
-    ValidationType validation_type = response_headers->RequiresValidation(
-        request->response_info().request_time,
-        request->response_info().response_time, base::Time::Now());
-    // TODO(rdsmith): Maybe handle VALIDATION_ASYNCHRONOUS by queueing
-    // a non-reload request for the dictionary.
-    if (validation_type != VALIDATION_NONE)
+    HttpResponseHeaders::ExpirationTimes expirations =
+        response_headers->GetExpirationTimes(
+            request->response_info().request_time,
+            request->response_info().response_time);
+    // TODO(rdsmith): Maybe handle stale resources by queueing a non-reload
+    // request for the dictionary.
+    if (base::Time::Now() >= expirations.GetExpirationTime())
       result = ERR_FAILED;
   }