Add cookies' first-partyness to chrome://settings/cookies

chrome/browser/browsing_data/cookies_tree_model.h

Index: chrome/browser/browsing_data/cookies_tree_model.h
diff --git a/chrome/browser/browsing_data/cookies_tree_model.h b/chrome/browser/browsing_data/cookies_tree_model.h
index b5f8e5b50d973ef9dad1768455d3d3d66f9ab684..29af2f5e2ad6caadef4e9a92f4f146f6e2f7c00e 100644
--- a/chrome/browser/browsing_data/cookies_tree_model.h
+++ b/chrome/browser/browsing_data/cookies_tree_model.h
@@ -636,6 +636,10 @@ class CookiesTreeModel : public ui::TreeNodeModel<CookieTreeNode> {
                    bool group_by_cookie_source);
   ~CookiesTreeModel() override;
 
+  // Given a CanonicalCookie, return the ID of the message which should be
+  // displayed in various ports' "Send for:" UI.
+  static int GetSendForMessageID(const net::CanonicalCookie& cookie);
+
   // Because non-cookie nodes are fetched in a background thread, they are not
   // present at the time the Model is created. The Model then notifies its
   // observers for every item added from databases, local storage, and