Componentize component_updater: Move some paths/constants to component.

chrome/browser/component_updater/component_updater_utils.h

Index: chrome/browser/component_updater/component_updater_utils.h
diff --git a/chrome/browser/component_updater/component_updater_utils.h b/chrome/browser/component_updater/component_updater_utils.h
index 7c238d28ed8dc8b7c871c31e8e8edaa837674d8e..e6db53d66241165b1d32ca5fec08025377b3dcb0 100644
--- a/chrome/browser/component_updater/component_updater_utils.h
+++ b/chrome/browser/component_updater/component_updater_utils.h
@@ -44,7 +44,9 @@ struct CrxUpdateItem;
 // If specified, |additional_attributes| are appended as attributes of the
 // request element. The additional attributes have to be well-formed for
 // insertion in the request element.
-std::string BuildProtocolRequest(const std::string& request_body,
+std::string BuildProtocolRequest(const std::string& application_version,
+                                 const std::string& platform_name,
+                                 const std::string& request_body,
                                  const std::string& additional_attributes);
 
 // Sends a protocol request to the the service endpoint specified by |url|.