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

chrome/browser/component_updater/caps_installer_win.cc

 // Copyright 2015 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 "chrome/browser/component_updater/caps_installer_win.h"
 
 #include <stdint.h>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 92 matching lines @@
     return user_data.Append(kCapsDirectory);
   }
 
   void GetHash(std::vector<uint8_t>* hash) const override {
     hash->assign(kSha256Hash,
                  kSha256Hash + arraysize(kSha256Hash));
   }
 
   // This string is shown in chrome://components.
   std::string GetName() const override { return "Chrome Crash Service"; }
+
+  std::string GetAp() const override { return std::string(); }
 };
 
 }  // namespace
 
 void RegisterCAPSComponent(ComponentUpdateService* cus) {
   // The component updater takes ownership of |installer|.
   scoped_ptr<ComponentInstallerTraits> traits(
       new CAPSInstallerTraits());
   DefaultComponentInstaller* installer =
       new DefaultComponentInstaller(std::move(traits));
   installer->Register(cus, base::Closure());
 }
 
 }  // namespace component_updater