Allow component installers to specify a map of installer attributes.

chrome/browser/component_updater/origin_trials_component_installer.cc

 // Copyright 2016 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/origin_trials_component_installer.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/path_service.h"
@@ skipping 84 matching lines @@
     std::vector<uint8_t>* hash) const {
   if (!hash)
     return;
   hash->assign(kSha256Hash, kSha256Hash + arraysize(kSha256Hash));
 }
 
 std::string OriginTrialsComponentInstallerTraits::GetName() const {
   return "Origin Trials";
 }
 
-std::string OriginTrialsComponentInstallerTraits::GetAp() const {
-  return std::string();
+update_client::InstallerAttributes
+OriginTrialsComponentInstallerTraits::GetInstallerAttributes() const {
+  return update_client::InstallerAttributes();
 }
 
 void RegisterOriginTrialsComponent(ComponentUpdateService* cus,
                                    const base::FilePath& user_data_dir) {
   std::unique_ptr<ComponentInstallerTraits> traits(
       new OriginTrialsComponentInstallerTraits());
   // |cus| will take ownership of |installer| during installer->Register(cus).
   DefaultComponentInstaller* installer =
       new DefaultComponentInstaller(std::move(traits));
   installer->Register(cus, base::Closure());
 }
 
 }  // namespace component_updater