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

content/public/browser/download_manager.h

Index: content/public/browser/download_manager.h
diff --git a/content/public/browser/download_manager.h b/content/public/browser/download_manager.h
index 16d161bff583ae4687554caa5504fe02ba2b59e1..b53151ac91dc10bbf8b3ea626b586346e0344329 100644
--- a/content/public/browser/download_manager.h
+++ b/content/public/browser/download_manager.h
@@ -114,17 +114,14 @@ class CONTENT_EXPORT DownloadManager : public base::SupportsUserData::Data {
       scoped_ptr<ByteStreamReader> stream,
       const DownloadUrlParameters::OnStartedCallback& on_started) = 0;
 
-  // Remove downloads which are same-origin with the given origin and pertain to
-  // the given time constraints. (See |RemoveDownloadsBetween|.)
-  virtual int RemoveDownloadsByOriginAndTime(const url::Origin& origin,
-                                             base::Time remove_begin,
-                                             base::Time remove_end) = 0;
-
-  // Remove downloads after remove_begin (inclusive) and before remove_end
-  // (exclusive). You may pass in null Time values to do an unbounded delete
-  // in either direction.
-  virtual int RemoveDownloadsBetween(base::Time remove_begin,
-                                     base::Time remove_end) = 0;
+  // Remove downloads whose URLs match the |url_filter| and are within
+  // the given time constraints - after remove_begin (inclusive) and before
+  // remove_end (exclusive). You may pass in null Time values to do an unbounded
+  // delete in either direction.
+  virtual int RemoveDownloadsByURLAndTime(
+      const base::Callback<bool(const GURL&)>& url_filter,
+      base::Time remove_begin,
+      base::Time remove_end) = 0;
 
   // Remove all downloads will delete all downloads. The number of downloads
   // deleted is returned back to the caller.