[FastTextAutosizer] Do not inflate table parts that do not need layout

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 371 matching lines @@
     // descendants without overflowing the cell width computed by the table layout. Therefore,
     // descendants of cells cannot use a multiplier higher than the table's multiplier.
     float multiplier = clusterMultiplier(cluster);
     for (RenderObject* section = table->firstChild(); section; section = section->nextSibling()) {
         if (!section->isTableSection())
             continue;
         for (RenderObject* row = section->firstChild(); row; row = row->nextSibling()) {
             if (!row->isTableRow())
                 continue;
             for (RenderObject* cell = row->firstChild(); cell; cell = cell->nextSibling()) {
-                if (!cell->isTableCell())
+                if (!cell->isTableCell() || !cell->needsLayout())
                     continue;
                 RenderTableCell* renderTableCell = toRenderTableCell(cell);
 
                 bool shouldAutosize;
                 if (blockSuppressesAutosizing(renderTableCell))
                     shouldAutosize = false;
                 else if (Supercluster* supercluster = getSupercluster(renderTableCell))
                     shouldAutosize = anyClusterHasEnoughTextToAutosize(supercluster->m_roots, table);
                 else
                     shouldAutosize = clusterWouldHaveEnoughTextToAutosize(renderTableCell, table);
 
                 if (shouldAutosize) {
                     for (RenderObject* child = cell; child; child = child->nextInPreOrder(cell)) {
-                        if (child->isText()) {
+                        if (child->isText() && child->needsLayout()) {
                             applyMultiplier(child, multiplier);
                             applyMultiplier(child->parent(), multiplier); // Parent handles line spacing.
                         }
                     }
                 }
             }
         }
     }
 }
 
@@ skipping 656 matching lines @@
 FastTextAutosizer::DeferUpdatePageInfo::~DeferUpdatePageInfo()
 {
     if (FastTextAutosizer* textAutosizer = m_mainFrame->document()->fastTextAutosizer()) {
         ASSERT(textAutosizer->m_updatePageInfoDeferred);
         textAutosizer->m_updatePageInfoDeferred = false;
         textAutosizer->updatePageInfoInAllFrames();
     }
 }
 
 } // namespace WebCore