Make Blacklist::IsBlacklist asynchronous (it will need to be for safe

chrome/browser/extensions/standard_management_policy_provider.h

 // Copyright 2012 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_STANDARD_MANAGEMENT_POLICY_PROVIDER_H_
 #define CHROME_BROWSER_EXTENSIONS_STANDARD_MANAGEMENT_POLICY_PROVIDER_H_
 
 #include "chrome/browser/extensions/management_policy.h"
 
 namespace extensions {
 
 class Blacklist;
 class Extension;
 class ExtensionPrefs;
 
 // The standard management policy provider, which takes into account the
 // extension black/whitelists and admin black/whitelists.
 class StandardManagementPolicyProvider : public ManagementPolicy::Provider {
  public:
-  // |prefs| and |blacklist| must outlive this.
-  StandardManagementPolicyProvider(ExtensionPrefs* prefs,
-                                   Blacklist* blacklist);
+  // |prefs| must outlive this.
+  explicit StandardManagementPolicyProvider(ExtensionPrefs* prefs);
 
   virtual ~StandardManagementPolicyProvider();
 
   // ManagementPolicy::Provider implementation.
   virtual std::string GetDebugPolicyProviderName() const OVERRIDE;
   virtual bool UserMayLoad(const Extension* extension,
                            string16* error) const OVERRIDE;
   virtual bool UserMayModifySettings(const Extension* extension,
                                      string16* error) const OVERRIDE;
   virtual bool MustRemainEnabled(const Extension* extension,
                                  string16* error) const OVERRIDE;
 
  private:
   ExtensionPrefs* const prefs_;
-
-  Blacklist* const blacklist_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_STANDARD_MANAGEMENT_POLICY_PROVIDER_H_