Marked a few html tests as flaky on chrome

tests/html/html.status

Index: tests/html/html.status
diff --git a/tests/html/html.status b/tests/html/html.status
index 7dd442766af527981d8cfd3596533e5e27498b4a..096821c332efff9e77fbf5c8952e54043b7bc932 100644
--- a/tests/html/html.status
+++ b/tests/html/html.status
@@ -14,15 +14,15 @@ interactive_test: Skip # Must be run manually.
 *layout_test: Skip
 
 [ $runtime == chrome ]
-element_types_test/supported_content: Fail
-element_types_test/supported_shadow: Fail
+element_types_test/supported_content: Pass, Fail # Issue 8700
+element_types_test/supported_shadow: Pass, Fail # Issue 8700
 input_element_test/supported_date: Pass, Fail      # Chrome stable does not support this input type.
 input_element_test/supported_datetime: Fail
-input_element_test/supported_datetime-local: Fail
-input_element_test/supported_month: Fail
-input_element_test/supported_week: Fail
+input_element_test/supported_datetime-local: Pass, Fail # Issue 8700
+input_element_test/supported_month: Pass, Fail # Issue 8700
+input_element_test/supported_week: Pass, Fail # Issue 8700
 speechrecognition_test/supported: Pass, Fail       # Chrome stable does not support it.
-shadow_dom_test/supported: Fail
+shadow_dom_test/supported: Pass, Fail # Issue 8700
 speechrecognition_test/types: Pass, Fail
 touchevent_test/supported: Fail