Add an OriginFilterBuilder class for [white|black]listing origins.

content/browser/download/download_manager_impl.h

Index: content/browser/download/download_manager_impl.h
diff --git a/content/browser/download/download_manager_impl.h b/content/browser/download/download_manager_impl.h
index ebac07ab08179a900b59b3ceb6d69402f9b8567d..2f8a705b49228a8518df5b1767eaf23e95b32e75 100644
--- a/content/browser/download/download_manager_impl.h
+++ b/content/browser/download/download_manager_impl.h
@@ -74,11 +74,10 @@ class CONTENT_EXPORT DownloadManagerImpl : public DownloadManager,
       scoped_ptr<ByteStreamReader> stream,
       const DownloadUrlParameters::OnStartedCallback& on_started) override;
 
-  int RemoveDownloadsByOriginAndTime(const url::Origin& origin,
-                                     base::Time remove_begin,
-                                     base::Time remove_end) override;
-  int RemoveDownloadsBetween(base::Time remove_begin,
-                             base::Time remove_end) override;
+  int RemoveDownloadsByURLAndTime(
+      const base::Callback<bool(const GURL&)>& url_filter,
+      base::Time remove_begin,
+      base::Time remove_end) override;
   int RemoveDownloads(base::Time remove_begin) override;
   int RemoveAllDownloads() override;
   void DownloadUrl(scoped_ptr<DownloadUrlParameters> params) override;