Add a SetCanonicalCookie method for CookieMonster.

net/cookies/cookie_store_test_helpers.cc

Index: net/cookies/cookie_store_test_helpers.cc
diff --git a/net/cookies/cookie_store_test_helpers.cc b/net/cookies/cookie_store_test_helpers.cc
index bed506f18081527aab26488a21747154c909c84c..d1c1ed50318bdd4ee5d215f5ae1b342fa0411a53 100644
--- a/net/cookies/cookie_store_test_helpers.cc
+++ b/net/cookies/cookie_store_test_helpers.cc
@@ -92,6 +92,14 @@ void DelayedCookieMonster::SetCookieWithDetailsAsync(
   NOTREACHED();
 }
 
+void DelayedCookieMonster::SetCanonicalCookieAsync(
+    std::unique_ptr<CanonicalCookie> cookie,
+    bool secure_source,
+    bool modify_http_only,
+    const SetCookiesCallback& callback) {
+  NOTREACHED();
+}
+
 void DelayedCookieMonster::GetCookiesWithOptionsAsync(
     const GURL& url,
     const CookieOptions& options,