use platform-independent font for gm

gm/displacement.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 "SkDisplacementMapEffect.h"
 #include "SkBitmapSource.h"
@@ skipping 19 matching lines @@
         make_checkerboard(&fLargeW,       96, 64);
         make_checkerboard(&fLargeH,       64, 96);
     }
 
     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(0xFF884422);
         paint.setTextSize(SkIntToScalar(96));
         const char* str = "g";
         canvas.drawText(str, strlen(str), SkIntToScalar(15), SkIntToScalar(55), paint);
     }
 
     void make_checkerboard(SkBitmap* bitmap, int w, int h) {
         bitmap->allocN32Pixels(w, h);
         SkCanvas canvas(*bitmap);
         canvas.clear(0x00000000);
@@ skipping 170 matching lines @@
     SkBitmap fBitmap, fCheckerboard, fSmall, fLarge, fLargeW, fLargeH;
     bool fInitialized;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new DisplacementMapGM; }
 static GMRegistry reg(MyFactory);
 
 }