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

chrome/browser/extensions/fake_safe_browsing_database_manager.h

Index: chrome/browser/extensions/fake_safe_browsing_database_manager.h
diff --git a/chrome/browser/extensions/fake_safe_browsing_database_manager.h b/chrome/browser/extensions/fake_safe_browsing_database_manager.h
index 2a91b73f9638dc1dd7b86069df56252fa3eb2330..d6b8e37bbf8c21ed65e48cd835b7f9ab8e79406b 100644
--- a/chrome/browser/extensions/fake_safe_browsing_database_manager.h
+++ b/chrome/browser/extensions/fake_safe_browsing_database_manager.h
@@ -18,7 +18,7 @@ namespace extensions {
 // 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
@@ -26,11 +26,18 @@ class FakeSafeBrowsingDatabaseManager : public SafeBrowsingDatabaseManager {
   virtual bool CheckExtensionIDs(const std::set<std::string>& extension_ids,
                                  Client* client) OVERRIDE;
 
-  void set_enabled(bool enabled) { enabled_ = enabled; }
-
-  void set_unsafe_ids(const std::set<std::string>& unsafe_ids) {
-    unsafe_ids_ = unsafe_ids;
-  }
+  // 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);
+
+  // Send the update notification.
+  void NotifyUpdate();
 
  private:
   virtual ~FakeSafeBrowsingDatabaseManager();