Need to update first-line when font finish loading.

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1522 matching lines @@
     if (!currentStyle)
         return false;
 
     const PseudoStyleCache* pseudoStyleCache = currentStyle->cachedPseudoStyles();
     if (!pseudoStyleCache)
         return false;
 
     size_t cacheSize = pseudoStyleCache->size();
     for (size_t i = 0; i < cacheSize; ++i) {
         RefPtr<ComputedStyle> newPseudoStyle;
-        PseudoId pseudoId = pseudoStyleCache->at(i)->styleType();
+        RefPtr<ComputedStyle> oldPseudoStyle = pseudoStyleCache->at(i);
+        PseudoId pseudoId = oldPseudoStyle->styleType();
         if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED)
             newPseudoStyle = layoutObject()->uncachedFirstLineStyle(newStyle);
         else
             newPseudoStyle = layoutObject()->getUncachedPseudoStyle(PseudoStyleRequest(pseudoId), newStyle, newStyle);
         if (!newPseudoStyle)
             return true;
-        if (*newPseudoStyle != *pseudoStyleCache->at(i)) {
+        if (*oldPseudoStyle != *newPseudoStyle || oldPseudoStyle->font().loadingCustomFonts() != newPseudoStyle->font().loadingCustomFonts()) {
             if (pseudoId < FIRST_INTERNAL_PSEUDOID)
                 newStyle->setHasPseudoStyle(pseudoId);
             newStyle->addCachedPseudoStyle(newPseudoStyle);
-            if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED) {
-                // FIXME: We should do an actual diff to determine whether a repaint vs. layout
-                // is needed, but for now just assume a layout will be required. The diff code
-                // in LayoutObject::setStyle would need to be factored out so that it could be reused.
-                layoutObject()->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::StyleChange);
-            }
+            if (pseudoId == FIRST_LINE || pseudoId == FIRST_LINE_INHERITED)
+                layoutObject()->firstLineStyleDidChange(*oldPseudoStyle, *newPseudoStyle);
             return true;
         }
     }
     return false;
 }
 
 PassRefPtr<ComputedStyle> Element::styleForLayoutObject()
 {
     ASSERT(document().inStyleRecalc());
 
@@ skipping 1862 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink