Promote CookieMonster::DeleteCanonicalCookieAsync to CookieStore.

ios/net/cookies/cookie_store_ios.mm

Index: ios/net/cookies/cookie_store_ios.mm
diff --git a/ios/net/cookies/cookie_store_ios.mm b/ios/net/cookies/cookie_store_ios.mm
index 519c129a708f34148b88ee5fd804292ab633fe6e..f50f0f8f4298edc3318201b0fd6afcdd72e3a01b 100644
--- a/ios/net/cookies/cookie_store_ios.mm
+++ b/ios/net/cookies/cookie_store_ios.mm
@@ -620,6 +620,29 @@ void CookieStoreIOS::DeleteCookieAsync(const GURL& url,
   }
 }
 
+void CookieStoreIOS::DeleteCanonicalCookieAsync(
+    const CanonicalCookie& cookie,
+    const DeleteCallback& callback) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  switch (synchronization_state_) {
+    case NOT_SYNCHRONIZED:
+      cookie_monster_->DeleteCanonicalCookieAsync(cookie,
+                                                  WrapDeleteCallback(callback));
+      break;
+    case SYNCHRONIZING:
+      tasks_pending_synchronization_.push_back(
+          base::Bind(&CookieStoreIOS::DeleteCanonicalCookieAsync, this, cookie,
+                     WrapDeleteCallback(callback)));
+      break;
+    case SYNCHRONIZED:
+      // This relies on the fact cookies are given unique creation dates.
+      CookieFilterFunction filter = base::Bind(
+          IsCookieCreatedBetween, cookie.CreationDate(), cookie.CreationDate());
+      DeleteCookiesWithFilter(filter, callback);
+  }
+}
+
 // CookieStoreIOS is an implementation of CookieStore which is not a
 // CookieMonster. As CookieStore is the main cookie API, a caller of
 // GetCookieMonster must handle the case where this returns null.