Form reset should clear the dirty flag of HTMLOptionElement

HTMLOptionElement::SetDirty() ignored the argument.  This CL fixes it.
Signed-off-by: sujiths.s <sujiths.s@samsung.com>
Review-Url: https://codereview.chromium.org/2906883002
Cr-Commit-Position: refs/heads/master@{#476128}

third_party/WebKit/LayoutTests/external/wpt/html/semantics/forms/resetting-a-form/reset-form-2-expected.txt

-This is a testharness.js-based test.
-FAIL integration test on reset for a created-from-script form assert_equals: option should reset dirtyness to false expected false but got true
-Harness: the test ran to completion.
-

third_party/WebKit/Source/core/html/HTMLOptionElement.cpp

@@ -284,7 +284,7 @@ void HTMLOptionElement::SetSelectedState(bool selected) {
 }
 
 void HTMLOptionElement::SetDirty(bool value) {
-  is_dirty_ = true;
+  is_dirty_ = value;
 }
 
 void HTMLOptionElement::ChildrenChanged(const ChildrenChange& change) {