Add extensions code to use common updater in components/update_client/

extensions/browser/updater/update_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 EXTENSIONS_BROWSER_UPDATER_UPDATE_SERVICE_H_
 #define EXTENSIONS_BROWSER_UPDATER_UPDATE_SERVICE_H_
 
 #include <string>
+#include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/keyed_service/core/keyed_service.h"
-#include "extensions/browser/updater/extension_downloader_delegate.h"
 
 namespace content {
 class BrowserContext;
 }
 
+namespace update_client {
+class UpdateClient;
+}
+
 namespace extensions {
 
-class ExtensionDownloader;
+class UpdateClientConfig;
+class UpdateDataProvider;
+class UpdateService;
 class UpdateServiceFactory;
-class UpdateServiceTest;
 
-// This service manages the download, update, and installation of extensions.
-// It is currently only used by app_shell, but should eventually replace
-// ExtensionUpdater in Chrome.
+// This service manages the autoupdate of extensions.  It should eventually
+// replace ExtensionUpdater in Chrome.

[Sorin Jianu, 2015/10/02 00:05:10]

I understand this is the new extension updater? This code is not in production
yet. Is my understanding correct?

[asargent_no_longer_on_chrome, 2015/10/06 21:31:17]

Right, in subsequent CL's I'll actually be using the StartUpdateCheck method in
this class for real extension update checks, but this CL doesn't do that yet. 

 // TODO(rockot): Replace ExtensionUpdater with this service.
-class UpdateService : public KeyedService, public ExtensionDownloaderDelegate {
+class UpdateService : public KeyedService {
  public:
   static UpdateService* Get(content::BrowserContext* context);
 
-  // TODO(rockot): Remove this. It's a placeholder for a real service interface.
-  // Downloads and (TODO) installs a CRX within the current browser context.
-  void DownloadAndInstall(const std::string& id,
-                          const base::Callback<void(bool)>& callback);
+  void Shutdown() override;
+
+  // Starts an update check for each of |extension_ids|. If there are any
+  // updates available, they will be downloaded, checked for integrity,
+  // unpacked, and then passed off to the ExtensionSystem::InstallUpdate method
+  // for install completion.
+  void StartUpdateCheck(std::vector<std::string> extension_ids);
 
  private:
   friend class UpdateServiceFactory;
-  friend class UpdateServiceTest;
 
-  explicit UpdateService(content::BrowserContext* context);
+  UpdateService(content::BrowserContext* context,
+                scoped_refptr<update_client::UpdateClient> update_client);
   ~UpdateService() override;
 
-  // ExtensionDownloaderDelegate:
-  void OnExtensionDownloadFailed(const std::string& id,
-                                 Error error,
-                                 const PingResult& ping,
-                                 const std::set<int>& request_ids) override;
-  void OnExtensionDownloadFinished(const CRXFileInfo& file,
-                                   bool file_ownership_passed,
-                                   const GURL& download_url,
-                                   const std::string& version,
-                                   const PingResult& ping,
-                                   const std::set<int>& request_id,
-                                   const InstallCallback& callback) override;
-  bool IsExtensionPending(const std::string& id) override;
-  bool GetExtensionExistingVersion(const std::string& id,
-                                   std::string* version) override;
+  content::BrowserContext* context_;
 
-  content::BrowserContext* browser_context_;
-  scoped_ptr<ExtensionDownloader> downloader_;
-  base::Callback<void(bool)> download_callback_;
+  scoped_refptr<update_client::UpdateClient> update_client_;
+  scoped_refptr<UpdateDataProvider> update_data_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateService);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_UPDATER_UPDATE_SERVICE_H_