Sanity tweaks to the extension blacklist: check all extensions at once on

chrome/browser/extensions/blacklist.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_BLACKLIST_H_
 #define CHROME_BROWSER_EXTENSIONS_BLACKLIST_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 37 matching lines @@
 
    private:
     scoped_refptr<SafeBrowsingDatabaseManager> original_;
 
     DISALLOW_COPY_AND_ASSIGN(ScopedDatabaseManagerForTest);
   };
 
   typedef base::Callback<void(const std::set<std::string>&)>
       GetBlacklistedIDsCallback;
 
+  typedef base::Callback<void(bool)> IsBlacklistedCallback;
+
   // |prefs_| must outlive this.
   explicit Blacklist(ExtensionPrefs* prefs);
 
   virtual ~Blacklist();
 
   // From the set of extension IDs passed in via |ids|, asynchronously checks
   // which are blacklisted and includes them in the resulting set passed
   // via |callback|, which will be sent on the caller's message loop.
   //
   // For a synchronous version which ONLY CHECKS CURRENTLY INSTALLED EXTENSIONS
   // see ExtensionPrefs::IsExtensionBlacklisted.
   void GetBlacklistedIDs(const std::set<std::string>& ids,
                          const GetBlacklistedIDsCallback& callback);
 
+  // More convenient form of GetBlacklistedIDs for checking a single extension.
+  void IsBlacklisted(const std::string& extension_id,
+                     const IsBlacklistedCallback& callback);
+
   // Sets the blacklist from the updater to contain the extension IDs in |ids|
   void SetFromUpdater(const std::vector<std::string>& ids,
                       const std::string& version);
 
   // Adds/removes an observer to the blacklist.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
  private:
   // Use via ScopedDatabaseManagerForTest.
@@ skipping 21 matching lines @@
   std::set<std::string> prefs_blacklist_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(Blacklist);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_BLACKLIST_H_