Added HttpUtils::HasValidators and HttpResponse::HasValidators

net/http/http_response_headers.h

Index: net/http/http_response_headers.h
diff --git a/net/http/http_response_headers.h b/net/http/http_response_headers.h
index caab083b7270fd9931f39cc4563560d067c897cf..eea6319311aeee7fb21794e82e640fc9185dfdc2 100644
--- a/net/http/http_response_headers.h
+++ b/net/http/http_response_headers.h
@@ -257,6 +257,11 @@ class NET_EXPORT HttpResponseHeaders
   // See section 13.3.3 of RFC 2616.
   bool HasStrongValidators() const;
 
+  // Returns true if this response has any validator (either a Last-Modified or
+  // an ETag) regardless of whether it is strong or weak.  See section 13.3.3 of
+  // RFC 2616.
+  bool HasValidators() const;
+
   // Extracts the value of the Content-Length header or returns -1 if there is
   // no such header in the response.
   int64 GetContentLength() const;