Recalc styles on resize if we have viewport units.

Source/WebCore/dom/DocumentStyleSheetCollection.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 50 matching lines @@
     , m_injectedStyleSheetCacheValid(false)
     , m_hadActiveLoadingStylesheet(false)
     , m_needsUpdateActiveStylesheetsOnStyleRecalc(false)
     , m_usesSiblingRules(false)
     , m_usesSiblingRulesOverride(false)
     , m_usesFirstLineRules(false)
     , m_usesFirstLetterRules(false)
     , m_usesBeforeAfterRules(false)
     , m_usesBeforeAfterRulesOverride(false)
     , m_usesRemUnits(false)
+    , m_usesViewportUnits(false)
 {
 }
 
 DocumentStyleSheetCollection::~DocumentStyleSheetCollection()
 {
     if (m_pageUserSheet)
         m_pageUserSheet->clearOwnerNode();
     for (unsigned i = 0; i < m_injectedUserStyleSheets.size(); ++i)
         m_injectedUserStyleSheets[i]->clearOwnerNode();
     for (unsigned i = 0; i < m_injectedAuthorStyleSheets.size(); ++i)
@@ skipping 339 matching lines @@
 
 static bool styleSheetsUseRemUnits(const Vector<RefPtr<CSSStyleSheet> >& sheets)
 {
     for (unsigned i = 0; i < sheets.size(); ++i) {
         if (sheets[i]->contents()->usesRemUnits())
             return true;
     }
     return false;
 }
 
+static bool styleSheetsUseViewportUnits(const Vector<RefPtr<CSSStyleSheet> >& sheets)
+{
+    for (unsigned i = 0; i < sheets.size(); ++i) {
+        if (sheets[i]->contents()->usesViewportUnits())
+            return true;
+    }
+    return false;
+}
+
 static void filterEnabledCSSStyleSheets(Vector<RefPtr<CSSStyleSheet> >& result, const Vector<RefPtr<StyleSheet> >& sheets)
 {
     for (unsigned i = 0; i < sheets.size(); ++i) {
         if (!sheets[i]->isCSSStyleSheet())
             continue;
         if (sheets[i]->disabled())
             continue;
         result.append(static_cast<CSSStyleSheet*>(sheets[i].get()));
     }
 }
@@ skipping 43 matching lines @@
         } else {
             ASSERT(styleResolverUpdateType == Additive);
             styleResolver->appendAuthorStyleSheets(m_activeAuthorStyleSheets.size(), activeCSSStyleSheets);
         }
         resetCSSFeatureFlags();
     }
     m_activeAuthorStyleSheets.swap(activeCSSStyleSheets);
     m_styleSheetsForStyleSheetList.swap(activeStyleSheets);
 
     m_usesRemUnits = styleSheetsUseRemUnits(m_activeAuthorStyleSheets);
+    m_usesViewportUnits = styleSheetsUseViewportUnits(m_activeAuthorStyleSheets);
     m_needsUpdateActiveStylesheetsOnStyleRecalc = false;
 
     m_document->notifySeamlessChildDocumentsOfStylesheetUpdate();
 
     return requiresFullStyleRecalc;
 }
 
 void DocumentStyleSheetCollection::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::DOM);
     info.addMember(m_pageUserSheet, "pageUserSheet");
     info.addMember(m_injectedUserStyleSheets, "injectedUserStyleSheets");
     info.addMember(m_injectedAuthorStyleSheets, "injectedAuthorStyleSheets");
     info.addMember(m_userStyleSheets, "userStyleSheets");
     info.addMember(m_authorStyleSheets, "authorStyleSheets");
     info.addMember(m_activeAuthorStyleSheets, "activeAuthorStyleSheets");
     info.addMember(m_styleSheetsForStyleSheetList, "styleSheetsForStyleSheetList");
     info.addMember(m_styleSheetCandidateNodes, "styleSheetCandidateNodes");
     info.addMember(m_preferredStylesheetSetName, "preferredStylesheetSetName");
     info.addMember(m_selectedStylesheetSetName, "selectedStylesheetSetName");
     info.addMember(m_document, "document");
 }
 
 }