add portable and canonical font support for DM

gm/bigtext.cpp

 /*
  * Copyright 2013 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 "SkPath.h"
@@ skipping 16 matching lines @@
         return SkString("bigtext");
     }
 
     virtual SkISize onISize() SK_OVERRIDE {
         return SkISize::Make(640, 480);
     }
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         SkPaint paint;
         paint.setAntiAlias(true);
+        sk_tool_utils::set_portable_typeface(&paint);
         paint.setTextSize(1500);
 
         SkRect r;
         (void)paint.measureText("/", 1, &r);
         SkPoint pos = {
             this->width()/2 - r.centerX(),
             this->height()/2 - r.centerY()
         };
 
         paint.setColor(SK_ColorRED);
         canvas->drawText("/", 1, pos.fX, pos.fY, paint);
 
         paint.setColor(SK_ColorBLUE);
         canvas->drawPosText("\\", 1, &pos, paint);
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return SkNEW(BigTextGM); )