Setting HTMLStyleElement should use RecalcStyleDeferred

Theres no reason to synchronously recalc style whenever you change the
media attribute of a <style>.

Review URL: https://codereview.chromium.org/205463002

git-svn-id: svn://svn.chromium.org/blink/trunk@169596 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -76,8 +76,7 @@ void HTMLStyleElement::parseAttribute(const QualifiedName& name, const AtomicStr
         scopedAttributeChanged(!value.isNull());
     } else if (name == mediaAttr && inDocument() && document().isActive() && m_sheet) {
         m_sheet->setMediaQueries(MediaQuerySet::create(value));
-        // FIXME: This shold be RecalcStyleDeferred.
-        document().modifiedStyleSheet(m_sheet.get(), RecalcStyleImmediately);
+        document().modifiedStyleSheet(m_sheet.get(), RecalcStyleDeferred);
     } else {
         HTMLElement::parseAttribute(name, value);
     }