[FastTextAutosizer] Incorporate accessibility and device scale factors

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 81 matching lines @@
         typedef WTF::HashMap<RenderBlock*, AtomicString> FingerprintMap;
         typedef WTF::HashMap<AtomicString, OwnPtr<BlockSet> > ReverseFingerprintMap;
 
         FingerprintMap m_fingerprints;
         ReverseFingerprintMap m_blocksForFingerprint;
     };
 
     explicit FastTextAutosizer(Document*);
 
     bool enabled();
-    void prepareWindowInfo(RenderView*);
+    void prepareRenderViewInfo(RenderView*);
     bool shouldBeClusterRoot(RenderBlock*);
     bool clusterWantsAutosizing(RenderBlock*);
     AtomicString computeFingerprint(RenderBlock*);
     Cluster* getOrCreateCluster(RenderBlock*);
     Cluster* createCluster(RenderBlock*);
     Cluster* addSupercluster(AtomicString, RenderBlock*);
     RenderBlock* deepestCommonAncestor(BlockSet&);
     float computeMultiplier(RenderBlock*);
     void applyMultiplier(RenderObject*, float);
 
     Document* m_document;
     int m_windowWidth; // Frame width in density-independent pixels (DIPs).
     int m_layoutWidth; // Layout width in CSS pixels.
+    float m_baseMultiplier; // Includes accessibility font scale factor and device scale adjustment.
+#ifndef NDEBUG
+    bool m_renderViewInfoPrepared; // Used for assertions.
+#endif
 
     // Clusters are created and destroyed during layout. The map key is the
     // cluster root. Clusters whose roots share the same fingerprint use the
     // same multiplier.
     ClusterMap m_clusters;
     ClusterStack m_clusterStack;
     FingerprintMapper m_fingerprintMapper;
 };
 
 } // namespace WebCore
 
 #endif // FastTextAutosizer_h