Skip a known assert/crash trigerred by .../syntax/parsing/html5lib_tests19.html

third_party/WebKit/LayoutTests/FlagExpectations/site-per-process

Index: third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
diff --git a/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process b/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
index 55009643206fd27a97139d3aad0716d5c6e77d12..0231847414eeb04f78140034ec44bb33102d843a 100644
--- a/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
+++ b/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
@@ -103,6 +103,10 @@ http/tests/security/frameNavigation/xss-ALLOWED-parent-navigation-change.html [
 http/tests/security/frameNavigation/xss-DENIED-top-navigation-without-user-gesture.html [ Failure ]
 http/tests/security/xss-DENIED-window-open-parent.html [ Failure ]
 
+# https://crbug.com/645641 - test_runner.cc(1863) Check failed:
+# layout_test_runtime_flags_.have_top_loading_frame()
+imported/wpt/html/syntax/parsing/html5lib_tests19.html [ Crash Failure ]
+
 # TODO(lukasza, alexmos): Triage these failures.
 fast/frames/cached-frame-counter.html [ Timeout ]
 fast/frames/frame-limit.html [ Timeout ]
@@ -136,7 +140,6 @@ imported/wpt/html/syntax/parsing/html5lib_tests15.html [ Failure ]
 imported/wpt/html/syntax/parsing/html5lib_tests16.html [ Failure ]
 imported/wpt/html/syntax/parsing/html5lib_tests17.html [ Failure ]
 imported/wpt/html/syntax/parsing/html5lib_tests18.html [ Failure ]
-imported/wpt/html/syntax/parsing/html5lib_tests19.html [ Failure ]
 imported/wpt/html/syntax/parsing/html5lib_tests2.html [ Failure ]
 imported/wpt/html/syntax/parsing/html5lib_tests20.html [ Failure ]
 imported/wpt/html/syntax/parsing/html5lib_tests21.html [ Failure ]