Move viewport unit resolution to style recalc time

Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 844 matching lines @@
     // Don't schedule more layouts, we're in one.
     TemporaryChange<bool> changeSchedulingEnabled(m_layoutSchedulingEnabled, false);
 
     if (!m_nestedLayoutCount && !m_inSynchronousPostLayout && m_postLayoutTasksTimer.isActive() && !frame().document()->shouldDisplaySeamlesslyWithParent()) {
         // This is a new top-level layout. If there are any remaining tasks from the previous layout, finish them now.
         m_inSynchronousPostLayout = true;
         performPostLayoutTasks();
         m_inSynchronousPostLayout = false;
     }
 
+    Document* document = m_frame->document();
+    document->notifyResizeForViewportUnits();
+
     // Viewport-dependent media queries may cause us to need completely different style information.
-    Document* document = m_frame->document();
-    if (!document->styleResolver() || document->styleResolver()->affectedByViewportChange()) {
+    if (!document->styleResolver() || document->styleResolver()->mediaQueryAffectedByViewportChange()) {
         document->styleResolverChanged(RecalcStyleDeferred);
         document->mediaQueryAffectingValueChanged();
 
         // FIXME: This instrumentation event is not strictly accurate since cached media query results
         //        do not persist across StyleResolver rebuilds.
         InspectorInstrumentation::mediaQueryResultChanged(document);
     } else {
         document->evaluateMediaQueryList();
     }
 
@@ skipping 2625 matching lines @@
 void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
 {
     ScrollableArea::willRemoveScrollbar(scrollbar, orientation);
     if (AXObjectCache* cache = axObjectCache()) {
         cache->remove(scrollbar);
         cache->handleScrollbarUpdate(this);
     }
 }
 
 } // namespace WebCore