Manage all the testing classes for Blacklist in TestBlacklist.

chrome/browser/extensions/blacklist.h

Index: chrome/browser/extensions/blacklist.h
diff --git a/chrome/browser/extensions/blacklist.h b/chrome/browser/extensions/blacklist.h
index e3cfc80be41bc05489d3a6a465e119da6c44827a..5df6d9ec5d6de5ebfb075b5784b4339dd154af19 100644
--- a/chrome/browser/extensions/blacklist.h
+++ b/chrome/browser/extensions/blacklist.h
@@ -93,9 +93,14 @@ class Blacklist : public content::NotificationObserver,
   void IsBlacklisted(const std::string& extension_id,
                      const IsBlacklistedCallback& callback);
 
-  // Used to mock BlacklistStateFetcher in unit tests.
+  // Used to mock BlacklistStateFetcher in unit tests. Blacklist owns the
+  // |fetcher|.
   void SetBlacklistStateFetcherForTest(BlacklistStateFetcher* fetcher);
 
+  // Reset the owned BlacklistStateFetcher to null and return the current
+  // BlacklistStateFetcher.
+  BlacklistStateFetcher* ResetBlacklistStateFetcherForTest();
+
   // Adds/removes an observer to the blacklist.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);