Replace ExtensionInstallChecker with generic PreloadCheckGroup

chrome/browser/extensions/extension_install_checker.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_CHECKER_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_CHECKER_H_
-
-#include <memory>
-#include <string>
-#include <vector>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "base/strings/string16.h"
-#include "extensions/browser/preload_check.h"
-#include "extensions/common/extension.h"
-
-class Profile;
-
-namespace extensions {
-
-// Performs common checks for validating whether an extension may be installed.
-// This class should be Start()-ed at most once.
-class ExtensionInstallChecker {
- public:
-  // Called when checks are complete. The returned value is a bitmask of
-  // failed checks.
-  typedef base::Callback<void(int)> Callback;
-
-  enum CheckType {
-    // Check the blacklist state of the extension.
-    CHECK_BLACKLIST = 1 << 0,
-    // Check whether the extension has requirement errors.
-    CHECK_REQUIREMENTS = 1 << 1,
-    // Check whether the extension can be installed and loaded, according to
-    // management policies.
-    CHECK_MANAGEMENT_POLICY = 1 << 2,
-    // Perform all checks.
-    CHECK_ALL = (1 << 3) - 1
-  };
-
-  // |enabled_checks| is a bitmask of CheckTypes to run.
-  // If |fail_fast| is true, the callback to Start() will be invoked once any
-  // check fails. Otherwise it will be invoked when all checks have completed.
-  ExtensionInstallChecker(Profile* profile,
-                          scoped_refptr<const Extension> extension,
-                          int enabled_checks,
-                          bool fail_fast);
-  virtual ~ExtensionInstallChecker();
-
-  // Starts the set of checks. |callback| will only be called once.
-  // This function must be called on the UI thread. The callback also occurs on
-  // the UI thread. Checks may run asynchronously in parallel.
-  // This function should be invoked at most once.
-  void Start(const Callback& callback);
-
-  // Returns true if any checks are currently running.
-  bool is_running() const { return running_checks_ != 0; }
-
-  // Returns the error message for requirement violations, if any were found.
-  const base::string16& requirements_error_message() const {
-    return requirements_error_message_;
-  }
-
-  // Returns the blacklist error of the extension. Note that there is only an
-  // error if the BlacklistState is BLACKLISTED_MALWARE or BLACKLISTED_UNKNOWN.
-  PreloadCheck::Error blacklist_error() const { return blacklist_error_; }
-
-  // Returns whether management policy permits installation of the extension.
-  const base::string16& policy_error() const { return policy_error_; }
-
-  void SetBlacklistCheckForTesting(std::unique_ptr<PreloadCheck> policy_check) {
-    blacklist_check_ = std::move(policy_check);
-  }
-  void SetPolicyCheckForTesting(std::unique_ptr<PreloadCheck> policy_check) {
-    policy_check_ = std::move(policy_check);
-  }
-  void SetRequirementsCheckForTesting(
-      std::unique_ptr<PreloadCheck> requirements_check) {
-    requirements_check_ = std::move(requirements_check);
-  }
-
- protected:
-  virtual void CheckManagementPolicy();
-  void OnManagementPolicyCheckDone(PreloadCheck::Errors errors);
-
-  virtual void CheckRequirements();
-  void OnRequirementsCheckDone(PreloadCheck::Errors errors);
-
-  virtual void CheckBlacklistState();
-  void OnBlacklistStateCheckDone(PreloadCheck::Errors errors);
-
- private:
-  void MaybeInvokeCallback();
-
-  // The Profile where the extension is being installed in.
-  Profile* profile_;
-
-  // The extension to run checks for.
-  scoped_refptr<const Extension> extension_;
-
-  // Checks requirements specified in the manifest.
-  std::unique_ptr<PreloadCheck> requirements_check_;
-  base::string16 requirements_error_message_;
-
-  // Checks if the extension is blacklisted.
-  std::unique_ptr<PreloadCheck> blacklist_check_;
-  PreloadCheck::Error blacklist_error_ = PreloadCheck::NONE;
-
-  // Checks whether management policies allow the extension to be installed.
-  std::unique_ptr<PreloadCheck> policy_check_;
-  base::string16 policy_error_;
-
-  // Bitmask of enabled checks.
-  int enabled_checks_;
-
-  // Bitmask of currently running checks.
-  // TODO(michaelpg): Consolidate this with enabled_checks_.
-  int running_checks_;
-
-  // If true, the callback is invoked when the first check fails.
-  bool fail_fast_;
-
-  // The callback to invoke when checks are complete.
-  Callback callback_;
-
-  base::WeakPtrFactory<ExtensionInstallChecker> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(ExtensionInstallChecker);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_CHECKER_H_