Add removal filter support for Cookies, Storage, and Content Settings.

chrome/browser/browsing_data/origin_filter_builder.h

Index: chrome/browser/browsing_data/origin_filter_builder.h
diff --git a/chrome/browser/browsing_data/origin_filter_builder.h b/chrome/browser/browsing_data/origin_filter_builder.h
index 092ec42b161422ee8c87132d9a155c3d8e2fe4f7..18c22fa6933c20dfaac9356820567fb72fe9fd9f 100644
--- a/chrome/browser/browsing_data/origin_filter_builder.h
+++ b/chrome/browser/browsing_data/origin_filter_builder.h
@@ -18,7 +18,9 @@
 class OriginFilterBuilder {
  public:
   enum Mode {
+    // This means that only the origins given will be deleted.
     WHITELIST,
+    // This means that the origins given will NOT be deleted.
     BLACKLIST
   };
 
@@ -33,6 +35,9 @@ class OriginFilterBuilder {
   // Sets the |mode| of the filter.
   void SetMode(Mode mode);
 
+  // Returns if we're an empty blacklist, where we delete everything.
+  bool IsEmptyBlacklist() const;
+
   // Builds a filter that matches URLs whose origins are in the whitelist,
   // or aren't in the blacklist.
   base::Callback<bool(const GURL&)> BuildSameOriginFilter() const;