AU: Implement server-dictated poll interval.

omaha_request_action.h

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_OMAHA_REQUEST_ACTION_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_OMAHA_REQUEST_ACTION_H__
 
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <fcntl.h>
 
 #include <string>
 
+#include <base/scoped_ptr.h>
 #include <curl/curl.h>
 
-#include "base/scoped_ptr.h"
 #include "update_engine/action.h"
 #include "update_engine/http_fetcher.h"
 
 // The Omaha Request action makes a request to Omaha and can output
 // the response on the output ActionPipe.
 
 namespace chromeos_update_engine {
 
 // Encodes XML entities in a given string with libxml2. input must be
 // UTF-8 formatted. Output will be UTF-8 formatted.
 std::string XmlEncode(const std::string& input);
 
 // This struct encapsulates the data Omaha's response for the request.
 // These strings in this struct are not XML escaped.
 struct OmahaResponse {
   OmahaResponse()
-      : update_exists(false), size(0), needs_admin(false), prompt(false) {}
+      : update_exists(false),
+        poll_interval(0),
+        size(0),
+        needs_admin(false),
+        prompt(false) {}
   // True iff there is an update to be downloaded.
   bool update_exists;
 
+  // If non-zero, server-dictated poll frequency in seconds.
+  int poll_interval;
+
   // These are only valid if update_exists is true:
   std::string display_version;
   std::string codebase;
   std::string more_info_url;
   std::string hash;
   off_t size;
   bool needs_admin;
   bool prompt;
   bool is_delta;
 };
@@ skipping 124 matching lines @@
   // are sent to Omaha.
   int ping_active_days_;
   int ping_roll_call_days_;
 
   DISALLOW_COPY_AND_ASSIGN(OmahaRequestAction);
 };
 
 }  // namespace chromeos_update_engine
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_OMAHA_REQUEST_ACTION_H__