Delete the omahaproxy-backed extension blacklist and clear its entries from the

chrome/browser/extensions/fake_safe_browsing_database_manager.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_EXTENSIONS_FAKE_SAFE_BROWSING_DATABASE_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_FAKE_SAFE_BROWSING_DATABASE_MANAGER_H_
 
 #include <set>
 #include <string>
 
 #include "chrome/browser/safe_browsing/database_manager.h"
 
 namespace extensions {
 
 // A fake safe browsing database manager for use with extensions tests.
 //
 // By default it is disabled (returning true and ignoring |unsafe_ids_|);
 // call set_enabled to enable it.
 class FakeSafeBrowsingDatabaseManager : public SafeBrowsingDatabaseManager {
  public:
-  FakeSafeBrowsingDatabaseManager();
+  explicit FakeSafeBrowsingDatabaseManager(bool enabled);
 
   // Returns true if synchronously safe, false if not in which case the unsafe
   // IDs taken from |unsafe_ids_| are passed to to |client| on the current
   // message loop.
   virtual bool CheckExtensionIDs(const std::set<std::string>& extension_ids,
                                  Client* client) OVERRIDE;
 
-  void set_enabled(bool enabled) { enabled_ = enabled; }
+  // Return |this| to chain together SetUnsafe(...).NotifyUpdate() conveniently.
+  FakeSafeBrowsingDatabaseManager& Enable();
+  FakeSafeBrowsingDatabaseManager& ClearUnsafe();
+  FakeSafeBrowsingDatabaseManager& SetUnsafe(const std::string& a);
+  FakeSafeBrowsingDatabaseManager& SetUnsafe(const std::string& a,
+                                             const std::string& b);
+  FakeSafeBrowsingDatabaseManager& SetUnsafe(const std::string& a,
+                                             const std::string& b,
+                                             const std::string& c);
 
-  void set_unsafe_ids(const std::set<std::string>& unsafe_ids) {
-    unsafe_ids_ = unsafe_ids;
-  }
+  // Send the update notification.
+  void NotifyUpdate();
 
  private:
   virtual ~FakeSafeBrowsingDatabaseManager();
 
   // Runs client->SafeBrowsingResult(result).
   void OnSafeBrowsingResult(scoped_ptr<SafeBrowsingCheck> result,
                             Client* client);
 
   // Whether to respond to CheckExtensionIDs immediately with true (indicating
   // that there is definitely no extension ID match).
   bool enabled_;
 
   // The extension IDs considered unsafe.
   std::set<std::string> unsafe_ids_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_FAKE_SAFE_BROWSING_DATABASE_MANAGER_H_