Need to update first-line when font finish loading.

Source/core/layout/LayoutObject.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1926 matching lines @@
         if (LocalFrame* frame = this->frame()) {
             // Cursor update scheduling is done by the local root, which is the main frame if there
             // are no RemoteFrame ancestors in the frame tree. Use of localFrameRoot() is
             // discouraged but will change when cursor update scheduling is moved from EventHandler
             // to PageEventHandler.
             frame->localFrameRoot()->eventHandler().scheduleCursorUpdate();
         }
     }
 }
 
+void LayoutObject::firstLineStyleDidChange(const ComputedStyle& oldStyle, const ComputedStyle& newStyle)
+{
+    StyleDifference diff = oldStyle.visualInvalidationDiff(newStyle);
+    if (diff.hasDifference()) {
+        // TODO(rune@opera.com): We should use the 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.
+        setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::StyleChange);
+    }
+}
+
 void LayoutObject::propagateStyleToAnonymousChildren(bool blockChildrenOnly)
 {
     // FIXME: We could save this call when the change only affected non-inherited properties.
     for (LayoutObject* child = slowFirstChild(); child; child = child->nextSibling()) {
         if (!child->isAnonymous() || child->style()->styleType() != NOPSEUDO)
             continue;
 
         if (blockChildrenOnly && !child->isLayoutBlock())
             continue;
 
@@ skipping 1297 matching lines @@
         const blink::LayoutObject* root = object1;
         while (root->parent())
             root = root->parent();
         root->showLayoutTreeAndMark(object1, "*", object2, "-", 0);
     } else {
         fprintf(stderr, "Cannot showLayoutTree. Root is (nil)\n");
     }
 }
 
 #endif