add portable and canonical font support for DM

gm/lumafilter.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 "SkGradientShader.h"
 #include "SkLumaColorFilter.h"
 
 static SkScalar kSize   = 80;
 static SkScalar kInset  = 10;
 static SkColor  kColor1 = SkColorSetARGB(0xff, 0xff, 0xff, 0);
 static SkColor  kColor2 = SkColorSetARGB(0xff, 0x80, 0xff, 0);
 
 static void draw_label(SkCanvas* canvas, const char* label,
                        const SkPoint& offset) {
     SkPaint paint;
+    sk_tool_utils::set_portable_typeface(&paint);
     size_t len = strlen(label);
 
     SkScalar width = paint.measureText(label, len);
     canvas->drawText(label, len, offset.x() - width / 2, offset.y(),
                      paint);
 }
 
 static void draw_scene(SkCanvas* canvas, SkColorFilter* filter,
                        SkXfermode::Mode mode, SkShader* s1,
                        SkShader* s2) {
@@ skipping 117 matching lines @@
 private:
     SkAutoTUnref<SkColorFilter> fFilter;
     SkAutoTUnref<SkShader>      fGr1, fGr2;
 
     typedef skiagm::GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return SkNEW(LumaFilterGM); )