Send traffic-management headers from extension updater.

chrome/browser/extensions/updater/extension_updater.h

 // Copyright (c) 2012 The Chromium 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 CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_
 #define CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_
 
 #include <list>
 #include <map>
 #include <memory>
@@ skipping 51 matching lines @@
 
     // The set of extensions that should be checked for updates. If empty
     // all extensions will be included in the update check.
     std::list<std::string> ids;
 
     // Normally extension updates get installed only when the extension is idle.
     // Setting this to true causes any updates that are found to be installed
     // right away.
     bool install_immediately;
 
+    // An extension update check can be originated by a user or by a timer.
+    // When the value of |foreground_check| is true, the update request was
+    // initiated by a user.
+    bool foreground_check;
+
     // Callback to call when the update check is complete. Can be null, if
     // you're not interested in when this happens.
     FinishedCallback callback;
   };
 
   // Holds a pointer to the passed |service|, using it for querying installed
   // extensions and installing updated ones. The |frequency_seconds| parameter
   // controls how often update checks are scheduled.
   ExtensionUpdater(ExtensionServiceInterface* service,
                    ExtensionPrefs* extension_prefs,
@@ skipping 78 matching lines @@
   // Sets the timer to call TimerFired after roughly |target_delay| from now.
   // To help spread load evenly on servers, this method adds some random
   // jitter. It also saves the scheduled time so it can be reloaded on
   // browser restart.
   void ScheduleNextCheck(const base::TimeDelta& target_delay);
 
   // Add fetch records for extensions that are installed to the downloader,
   // ignoring |pending_ids| so the extension isn't fetched again.
   void AddToDownloader(const ExtensionSet* extensions,
                        const std::list<std::string>& pending_ids,
-                       int request_id);
+                       int request_id,
+                       bool foreground_check);
 
   // BaseTimer::ReceiverMethod callback.
   void TimerFired();
 
   // Posted by CheckSoon().
   void DoCheckSoon();
 
   // Implementation of ExtensionDownloaderDelegate.
   void OnExtensionDownloadFailed(const std::string& id,
                                  Error error,
@@ skipping 70 matching lines @@
   ExtensionCache* extension_cache_;
 
   base::WeakPtrFactory<ExtensionUpdater> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionUpdater);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_