Do not cache the result of RenderStyle::computedLineHeight()

Source/core/rendering/FastTextAutosizer.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 952 matching lines @@
     style->setUnique();
 
     switch (relayoutBehavior) {
     case AlreadyInLayout:
         // Don't free currentStyle until the end of the layout pass. This allows other parts of the system
         // to safely hold raw RenderStyle* pointers during layout, e.g. BreakingContext::m_currentStyle.
         m_stylesRetainedDuringLayout.append(currentStyle);
 
         renderer->setStyleInternal(style.release());
         renderer->setNeedsLayoutAndFullPaintInvalidation();
-        if (renderer->isRenderBlock())
-            toRenderBlock(renderer)->invalidateLineHeight();
         break;
 
     case LayoutNeeded:
         renderer->setStyle(style.release());
         break;
     }
 
     if (multiplier != 1)
         m_pageInfo.m_hasAutosized = true;
 }
@@ skipping 142 matching lines @@
 FastTextAutosizer::DeferUpdatePageInfo::~DeferUpdatePageInfo()
 {
     if (FastTextAutosizer* textAutosizer = m_mainFrame->document()->fastTextAutosizer()) {
         ASSERT(textAutosizer->m_updatePageInfoDeferred);
         textAutosizer->m_updatePageInfoDeferred = false;
         textAutosizer->updatePageInfoInAllFrames();
     }
 }
 
 } // namespace WebCore