Implement an API to allow passing an "ap" parameter to component updates.

components/update_client/update_checker.cc

 // Copyright 2014 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.
 
 #include "components/update_client/update_checker.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
@@ skipping 15 matching lines @@
 
 namespace update_client {
 
 namespace {
 
 // Returns a sanitized version of the brand or an empty string otherwise.
 std::string SanitizeBrand(const std::string& brand) {
   return IsValidBrand(brand) ? brand : std::string("");
 }
 
+// Returns a sanitized version of the |ap| or an empty string otherwise.
+std::string SanitizeAp(const std::string& ap) {
+  return IsValidAp(ap) ? ap : std::string();
+}
+
 // Returns true if at least one item requires network encryption.
 bool IsEncryptionRequired(const std::vector<CrxUpdateItem*>& items) {
   for (const auto& item : items) {
     if (item->component.requires_network_encryption)
       return true;
   }
   return false;
 }
 
 // Builds an update check request for |components|. |additional_attributes| is
@@ skipping 10 matching lines @@
 //        <package fp="abcd" />
 //      </packages>
 //    </app>
 std::string BuildUpdateCheckRequest(const Configurator& config,
                                     const std::vector<CrxUpdateItem*>& items,
                                     const std::string& additional_attributes) {
   const std::string brand(SanitizeBrand(config.GetBrand()));
   std::string app_elements;
   for (size_t i = 0; i != items.size(); ++i) {
     const CrxUpdateItem* item = items[i];
+    const std::string ap(SanitizeAp(item->component.ap));
     std::string app("<app ");
     base::StringAppendF(&app, "appid=\"%s\" version=\"%s\"", item->id.c_str(),
                         item->component.version.GetString().c_str());
     if (!brand.empty())
       base::StringAppendF(&app, " brand=\"%s\"", brand.c_str());
     if (item->on_demand)
       base::StringAppendF(&app, " installsource=\"ondemand\"");
+    if (!ap.empty())
+      base::StringAppendF(&app, " ap=\"%s\"", ap.c_str());
     base::StringAppendF(&app, ">");
     base::StringAppendF(&app, "<updatecheck />");
     if (!item->component.fingerprint.empty()) {
       base::StringAppendF(&app,
                           "<packages>"
                           "<package fp=\"%s\"/>"
                           "</packages>",
                           item->component.fingerprint.c_str());
     }
     base::StringAppendF(&app, "</app>");
@@ skipping 88 matching lines @@
 }
 
 }  // namespace
 
 scoped_ptr<UpdateChecker> UpdateChecker::Create(
     const scoped_refptr<Configurator>& config) {
   return scoped_ptr<UpdateChecker>(new UpdateCheckerImpl(config));
 }
 
 }  // namespace update_client