add portable and canonical font support for DM

gm/xfermodeimagefilter.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 "SkArithmeticMode.h"
 #include "SkOffsetImageFilter.h"
@@ skipping 16 matching lines @@
     virtual SkString onShortName() SK_OVERRIDE {
         return SkString("xfermodeimagefilter");
     }
 
     void make_bitmap() {
         fBitmap.allocN32Pixels(80, 80);
         SkCanvas canvas(fBitmap);
         canvas.clear(0x00000000);
         SkPaint paint;
         paint.setAntiAlias(true);
+        sk_tool_utils::set_portable_typeface(&paint);
         paint.setColor(0xD000D000);
         paint.setTextSize(SkIntToScalar(96));
         const char* str = "e";
         canvas.drawText(str, strlen(str), SkIntToScalar(15), SkIntToScalar(65), paint);
     }
 
     void make_checkerboard() {
         fCheckerboard.allocN32Pixels(80, 80);
         SkCanvas canvas(fCheckerboard);
         canvas.clear(0x00000000);
@@ skipping 170 matching lines @@
 private:
     SkBitmap fBitmap, fCheckerboard;
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new XfermodeImageFilterGM; );
 
 }