add size limit for using glyphcache. above that, draw using paths

include/core/SkDraw.h

Index: include/core/SkDraw.h
diff --git a/include/core/SkDraw.h b/include/core/SkDraw.h
index 2a8afc4876f0dad1774b9ec06ea5562f33ec41b1..293d4e3c78dcfb3934a5637056cf2016745f1743 100644
--- a/include/core/SkDraw.h
+++ b/include/core/SkDraw.h
@@ -103,6 +103,10 @@ private:
     void    drawDevMask(const SkMask& mask, const SkPaint&) const;
     void    drawBitmapAsMask(const SkBitmap&, const SkPaint&) const;
 
+    void    drawPosText_asPaths(const char text[], size_t byteLength,
+                                const SkScalar pos[], SkScalar constY,
+                                int scalarsPerPosition, const SkPaint&) const;
+    
     /**
      *  Return the current clip bounds, in local coordinates, with slop to account
      *  for antialiasing or hairlines (i.e. device-bounds outset by 1, and then
@@ -114,6 +118,8 @@ private:
     bool SK_WARN_UNUSED_RESULT
     computeConservativeLocalClipBounds(SkRect* bounds) const;
 
+    static bool ShouldDrawTextAsPaths(const SkPaint&, const SkMatrix&);
+
 public:
     const SkBitmap* fBitmap;        // required
     const SkMatrix* fMatrix;        // required