add portable and canonical font support for DM

gm/stroketext.cpp

 /*
  * Copyright 2014 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 "SkCanvas.h"
 #include "SkDashPathEffect.h"
@@ skipping 69 matching lines @@
     }
 
     virtual SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(1200, 480);
     }
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         if (true) { test_nulldev(canvas); }
         SkPaint paint;
         paint.setAntiAlias(true);
+        sk_tool_utils::set_portable_typeface(&paint);
 
         paint.setTextSize(kBelowThreshold_TextSize);
         draw_text_set(canvas, paint);
 
         canvas->translate(600, 0);
         paint.setTextSize(kAboveThreshold_TextSize);
         draw_text_set(canvas, paint);
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return SkNEW(StrokeTextGM); )