Do not try to convert point to root coordinate space when |local_frame_id_| is invalid.

chrome/browser/ssl/ssl_browser_tests.cc

Index: chrome/browser/ssl/ssl_browser_tests.cc
diff --git a/chrome/browser/ssl/ssl_browser_tests.cc b/chrome/browser/ssl/ssl_browser_tests.cc
index 4be805da46bbe5f517cee46a378665d9cf096291..c5caed5ee58213e2619d2f609ebb6e02b66f330b 100644
--- a/chrome/browser/ssl/ssl_browser_tests.cc
+++ b/chrome/browser/ssl/ssl_browser_tests.cc
@@ -2350,11 +2350,6 @@ IN_PROC_BROWSER_TEST_F(SSLUITest, TestBadFrameNavigation) {
 // From an HTTP top frame, navigate to good and bad HTTPS (security state should
 // stay unauthenticated).
 IN_PROC_BROWSER_TEST_F(SSLUITest, TestUnauthenticatedFrameNavigation) {
-  // TODO(crbug.com/668913): Flaky with --site-per-process.
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kSitePerProcess)) {
-    return;
-  }
   ASSERT_TRUE(embedded_test_server()->Start());
   ASSERT_TRUE(https_server_.Start());
   ASSERT_TRUE(https_server_expired_.Start());