Hold cros_component_installers in browser_process.

chrome/browser/component_updater/cros_component_installer.h

 // Copyright 2017 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.
 
 #ifndef CHROME_BROWSER_COMPONENT_UPDATER_CROS_COMPONENT_INSTALLER_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_CROS_COMPONENT_INSTALLER_H_
 
 #include <string>
 
 #include "build/build_config.h"
@@ skipping 88 matching lines @@
       const std::string& name,
       const update_client::Callback& install_callback);
 
   static void LoadCrOSComponent(
       const std::string& name,
       const base::Callback<void(const std::string&)>& mount_callback);
 
  private:
   CrOSComponent() {}
   // Register a component.
-  static void RegisterCrOSComponentInternal(ComponentUpdateService* cus,
+  static void RegisterCrOSComponentInternal(const std::string& name,
+                                            ComponentUpdateService* cus,
                                             const ComponentConfig& config,
                                             const base::Closure& callback);
   // A helper function to pass into RegisterCrOSComonentInternal as a callback.
   // It calls OnDemandUpdate to install the component right after being
   // registered.
   static void InstallChromeOSComponent(
       ComponentUpdateService* cus,
       const std::string& id,
       const update_client::Callback& install_callback);
 };
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace component_updater
 
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_CROS_COMPONENT_INSTALLER_H_