Component updater: send extra attributes in the request to

chrome/browser/component_updater/component_updater_service.h

Index: chrome/browser/component_updater/component_updater_service.h
===================================================================
--- chrome/browser/component_updater/component_updater_service.h	(revision 103990)
+++ chrome/browser/component_updater/component_updater_service.h	(working copy)
@@ -101,6 +101,8 @@
     virtual int MinimumReCheckWait() = 0;
     // The url that is going to be used update checks over Omaha protocol.
     virtual GURL UpdateUrl() = 0;
+    // Parameters added to each url request. It can be null if none are needed.
+    virtual const char* ExtraRequestParams() = 0;
     // How big each update request can be. Don't go above 2000.
     virtual size_t UrlSizeLimit() = 0;
     // The source of contexts for all the url requests.