Implement reportValidity()

LayoutTests/fast/forms/reportValidity-cancel-expected.txt

Index: LayoutTests/fast/forms/reportValidity-cancel-expected.txt
diff --git a/LayoutTests/fast/forms/reportValidity-cancel-expected.txt b/LayoutTests/fast/forms/reportValidity-cancel-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..70db8314ed7374ed1d11ccfa3b43cb87c62c713e
--- /dev/null
+++ b/LayoutTests/fast/forms/reportValidity-cancel-expected.txt
@@ -0,0 +1,22 @@
+ValidationMessageClient: main-message=Please fill out this field. sub-message=
+ValidationMessageClient: main-message=Please fill out this field. sub-message=
+Tests for reportValidity() with invalid event canceling
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+"invalid" event is not canceled.
+PASS input.addEventListener("invalid", nothingListener, false); !input.reportValidity() && invalidFired is true
+PASS backgroundOf("input-unset") is focusedColor
+PASS invalidFired = false; !form.reportValidity() && invalidFired is true
+PASS backgroundOf("input-unset") is focusedColor
+
+"invalid" event is canceled.
+PASS input.addEventListener("invalid", cancelListener, false); !input.reportValidity() && invalidFired is true
+PASS backgroundOf("input-unset") is unfocusedColor
+PASS invalidFired = false; !form.reportValidity() && invalidFired is true
+PASS backgroundOf("input-unset") is unfocusedColor
+PASS successfullyParsed is true
+
+TEST COMPLETE
+