Implement restart-required message on Linux.

components/component_updater/component_updater_service.h

 // 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.
 
 #ifndef COMPONENTS_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
 #define COMPONENTS_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 39 matching lines @@
 
 namespace component_updater {
 
 class OnDemandUpdater;
 
 using Configurator = update_client::Configurator;
 using CrxComponent = update_client::CrxComponent;
 using CrxUpdateItem = update_client::CrxUpdateItem;
 
 struct ComponentInfo {
-  ComponentInfo(const std::string& id, const base::string16& name);
+  ComponentInfo(const std::string& id, const base::string16& name,
+                const base::Version& version);
   ~ComponentInfo();
 
   const std::string id;
   const base::string16 name;
+  const base::Version version;
 };
 
 // The component update service is in charge of installing or upgrading
 // select parts of chrome. Each part is called a component and managed by
 // instances of CrxComponent registered using RegisterComponent(). On the
 // server, each component is packaged as a CRX which is the same format used
 // to package extensions. To the update service each component is identified
 // by its public key hash (CrxComponent::pk_hash). If there is an update
 // available and its version is bigger than (CrxComponent::version), it will
 // be downloaded, verified and unpacked. Then component-specific installer
@@ skipping 100 matching lines @@
       ComponentUpdateService::CompletionCallback callback) = 0;
 };
 
 // Creates the component updater.
 std::unique_ptr<ComponentUpdateService> ComponentUpdateServiceFactory(
     const scoped_refptr<Configurator>& config);
 
 }  // namespace component_updater
 
 #endif  // COMPONENTS_COMPONENT_UPDATER_COMPONENT_UPDATER_SERVICE_H_