Fix scaling issue with distance field text.

gm/fontscaler.cpp

Index: gm/fontscaler.cpp
diff --git a/gm/fontscaler.cpp b/gm/fontscaler.cpp
index 8aef8f0ebe37798099dc48083b131731ccaa0b74..eb38013cb1bdd44f021d2ba3a5cfe239d2ae9ffa 100644
--- a/gm/fontscaler.cpp
+++ b/gm/fontscaler.cpp
@@ -72,12 +72,10 @@ protected:
                     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));