Componentize component_updater: Move over a bunch of files to the component.

chrome/browser/component_updater/default_component_installer.h

-// Copyright 2013 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_DEFAULT_COMPONENT_INSTALLER_H_
-#define CHROME_BROWSER_COMPONENT_UPDATER_DEFAULT_COMPONENT_INSTALLER_H_
-
-#include <string>
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/threading/thread_checker.h"
-#include "base/values.h"
-#include "base/version.h"
-#include "chrome/browser/component_updater/component_updater_service.h"
-
-namespace base {
-class FilePath;
-class SequencedTaskRunner;
-class SingleThreadTaskRunner;
-}  // namespace base
-
-namespace component_updater {
-
-// Components should use a DefaultComponentInstaller by defining a class that
-// implements the members of ComponentInstallerTraits, and then registering a
-// DefaultComponentInstaller that has been constructed with an instance of that
-// class.
-class ComponentInstallerTraits {
- public:
-  virtual ~ComponentInstallerTraits();
-
-  // Verifies that a working installation resides within the directory specified
-  // by |dir|. |dir| is of the form <base directory>/<version>.
-  // Called only from a thread belonging to a blocking thread pool.
-  // The implementation of this function must be efficient since the function
-  // can be called when Chrome starts.
-  virtual bool VerifyInstallation(const base::FilePath& dir) const = 0;
-
-  // Returns true if the component can be automatically updated. Called once
-  // during component registration from the UI thread.
-  virtual bool CanAutoUpdate() const = 0;
-
-  // OnCustomInstall is called during the installation process. Components that
-  // require custom installation operations should implement them here.
-  // Returns false if a custom operation failed, and true otherwise.
-  // Called only from a thread belonging to a blocking thread pool.
-  virtual bool OnCustomInstall(const base::DictionaryValue& manifest,
-                               const base::FilePath& install_dir) = 0;
-
-  // ComponentReady is called in two cases:
-  //   1) After an installation is successfully completed.
-  //   2) During component registration if the component is already installed.
-  // In both cases the install is verified before this is called. This method
-  // is guaranteed to be called before any observers of the component are
-  // notified of a successful install, and is meant to support follow-on work
-  // such as updating paths elsewhere in Chrome. Called on the UI thread.
-  // |version| is the version of the component.
-  // |install_dir| is the path to the install directory for this version.
-  // |manifest| is the manifest for this version of the component.
-  virtual void ComponentReady(const base::Version& version,
-                              const base::FilePath& install_dir,
-                              scoped_ptr<base::DictionaryValue> manifest) = 0;
-
-  // Returns the directory that the installer will place versioned installs of
-  // the component into.
-  virtual base::FilePath GetBaseDirectory() const = 0;
-
-  // Returns the component's SHA2 hash as raw bytes.
-  virtual void GetHash(std::vector<uint8>* hash) const = 0;
-
-  // Returns the human-readable name of the component.
-  virtual std::string GetName() const = 0;
-};
-
-// A DefaultComponentInstaller is intended to be final, and not derived from.
-// Customization must be provided by passing a ComponentInstallerTraits object
-// to the constructor.
-class DefaultComponentInstaller : public ComponentInstaller {
- public:
-  DefaultComponentInstaller(
-      scoped_ptr<ComponentInstallerTraits> installer_traits);
-
-  // Registers the component for update checks and installs.
-  void Register(ComponentUpdateService* cus);
-
-  // Overridden from ComponentInstaller:
-  virtual void OnUpdateError(int error) OVERRIDE;
-  virtual bool Install(const base::DictionaryValue& manifest,
-                       const base::FilePath& unpack_path) OVERRIDE;
-  virtual bool GetInstalledFile(const std::string& file,
-                                base::FilePath* installed_file) OVERRIDE;
-
-  virtual ~DefaultComponentInstaller();
-
- private:
-  base::FilePath GetInstallDirectory();
-  bool InstallHelper(const base::DictionaryValue& manifest,
-                     const base::FilePath& unpack_path,
-                     const base::FilePath& install_path);
-  void StartRegistration(ComponentUpdateService* cus);
-  void FinishRegistration(ComponentUpdateService* cus);
-
-  base::Version current_version_;
-  std::string current_fingerprint_;
-  scoped_ptr<base::DictionaryValue> current_manifest_;
-  scoped_ptr<ComponentInstallerTraits> installer_traits_;
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
-
-  // Used to post responses back to the main thread. Initialized on the main
-  // loop but accessed from the task runner.
-  scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
-
-  base::ThreadChecker thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(DefaultComponentInstaller);
-};
-
-}  // namespace component_updater
-
-#endif  // CHROME_BROWSER_COMPONENT_UPDATER_DEFAULT_COMPONENT_INSTALLER_H_