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

chrome/browser/browsing_data/origin_filter_builder.cc

Index: chrome/browser/browsing_data/origin_filter_builder.cc
diff --git a/chrome/browser/browsing_data/origin_filter_builder.cc b/chrome/browser/browsing_data/origin_filter_builder.cc
index 900b018310032b7c25264d00343dea8c920a9868..c441b8f61a877c658180d0ac4355636396ec785e 100644
--- a/chrome/browser/browsing_data/origin_filter_builder.cc
+++ b/chrome/browser/browsing_data/origin_filter_builder.cc
@@ -47,6 +47,10 @@ void OriginFilterBuilder::SetMode(Mode mode) {
   mode_ = mode;
 }
 
+bool OriginFilterBuilder::IsEmptyBlacklist() const {
+  return mode_ == Mode::BLACKLIST && origin_list_.empty();
+}
+
 base::Callback<bool(const GURL&)>
     OriginFilterBuilder::BuildSameOriginFilter() const {
   std::set<url::Origin>* origins = new std::set<url::Origin>(origin_list_);