Reset multipliers when FTA is disabled.

Source/core/rendering/FastTextAutosizer.h

 /*
  * 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 180 matching lines @@
         void assertMapsAreConsistent();
 #endif
     };
 
     explicit FastTextAutosizer(const Document*);
 
     void beginLayout(RenderBlock*);
     void endLayout(RenderBlock*);
     void inflateTable(RenderTable*);
     void inflate(RenderBlock*);
-    bool enabled();
+    bool enabled() const;
+    bool shouldHandleLayout() const;
     void setAllTextNeedsLayout();
     void resetMultipliers();
     void prepareClusterStack(const RenderObject*);
     bool isFingerprintingCandidate(const RenderBlock*);
     bool clusterHasEnoughTextToAutosize(Cluster*, const RenderBlock* widthProvider = 0);
     bool anyClusterHasEnoughTextToAutosize(const BlockSet* roots, const RenderBlock* widthProvider = 0);
     bool clusterWouldHaveEnoughTextToAutosize(const RenderBlock* root, const RenderBlock* widthProvider = 0);
     Fingerprint getFingerprint(const RenderObject*);
     Fingerprint computeFingerprint(const RenderObject*);
     Cluster* maybeCreateCluster(const RenderBlock*);
@@ skipping 40 matching lines @@
     // cluster root. Clusters whose roots share the same fingerprint use the
     // same multiplier.
     SuperclusterMap m_superclusters;
     ClusterStack m_clusterStack;
     FingerprintMapper m_fingerprintMapper;
 };
 
 } // namespace WebCore
 
 #endif // FastTextAutosizer_h