Fix scaling issue with distance field text.

gm/fontscaler.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "gm.h"
 #include "SkTypeface.h"
 
 namespace skiagm {
@@ skipping 54 matching lines @@
 
                 {
                     SkPaint p;
                     p.setAntiAlias(true);
                     SkRect r;
                     r.set(x - SkIntToScalar(3), SkIntToScalar(15),
                           x - SkIntToScalar(1), SkIntToScalar(280));
                     canvas->drawRect(r, p);
                 }
 
-                int index = 0;
                 for (int ps = 6; ps <= 22; ps++) {
                     paint.setTextSize(SkIntToScalar(ps));
                     canvas->drawText(text, textLen, x, y, paint);
                     y += paint.getFontMetrics(NULL);
-                    index += 1;
                 }
             }
             canvas->translate(0, SkIntToScalar(360));
             paint.setSubpixelText(true);
         }
     }
 
 private:
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new FontScalerGM; }
 static GMRegistry reg(MyFactory);
 
 }