Pass a RemovalCause to CookieChangedCallback

net/cookies/cookie_store.cc

Index: net/cookies/cookie_store.cc
diff --git a/net/cookies/cookie_store.cc b/net/cookies/cookie_store.cc
index 1f1b7b96460b8e7410e6940123bdb66d1fa7d342..e828b6688582c388cc72155d1bcfcc7920d7080d 100644
--- a/net/cookies/cookie_store.cc
+++ b/net/cookies/cookie_store.cc
@@ -12,6 +12,10 @@ namespace net {
 
 CookieStore::~CookieStore() {}
 
+bool CookieStore::ChangeCauseIsDeletion(CookieStore::ChangeCause cause) {
+  return cause != CookieStore::CHANGE_COOKIE_INSERTED;
+}
+
 std::string CookieStore::BuildCookieLine(
     const std::vector<CanonicalCookie>& cookies) {
   std::string cookie_line;