use platform-independent font for gm

tools/sk_tool_utils.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 "sk_tool_utils.h"
+#include "../src/fonts/SkTestScalerContext.h"
 
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 
 namespace sk_tool_utils {
 
+bool gEnablePortableTypeface = false;
+
 const char* colortype_name(SkColorType ct) {
     switch (ct) {
         case kUnknown_SkColorType:      return "Unknown";
         case kAlpha_8_SkColorType:      return "Alpha_8";
         case kIndex_8_SkColorType:      return "Index_8";
         case kARGB_4444_SkColorType:    return "ARGB_4444";
         case kRGB_565_SkColorType:      return "RGB_565";
         case kRGBA_8888_SkColorType:    return "RGBA_8888";
         case kBGRA_8888_SkColorType:    return "BGRA_8888";
         default:
             SkASSERT(false);
             return "unexpected colortype";
     }
 }
 
+SkPaint::FontMetrics create_font(SkTDArray<SkPath*>& , SkTDArray<SkFixed>& );
+
+void set_portable_typeface(SkPaint* paint, SkTypeface::Style style) {
+    if (gEnablePortableTypeface) {
+        SkSafeUnref(paint->setTypeface(CreateTestTypeface(create_font, style)));
+    }
+}
+
 void write_pixels(SkCanvas* canvas, const SkBitmap& bitmap, int x, int y,
                   SkColorType colorType, SkAlphaType alphaType) {
     SkBitmap tmp(bitmap);
     tmp.lockPixels();
 
     SkImageInfo info = tmp.info();
     info.fColorType = colorType;
     info.fAlphaType = alphaType;
 
     canvas->writePixels(info, tmp.getPixels(), tmp.rowBytes(), x, y);
 }
 
 }  // namespace sk_tool_utils