use platform-independent font for gm

tools/sk_tool_utils.h

Index: tools/sk_tool_utils.h
diff --git a/tools/sk_tool_utils.h b/tools/sk_tool_utils.h
index 2bd42b607668be23ea8378b323e195bb932285cd..151325d7d1312ec72f63f14c34105b4a5a5817d2 100644
--- a/tools/sk_tool_utils.h
+++ b/tools/sk_tool_utils.h
@@ -8,16 +8,24 @@
 #ifndef sk_tool_utils_DEFINED
 #define sk_tool_utils_DEFINED
 
+#include "SkBitmap.h"
+#include "SkCanvas.h"
 #include "SkImageInfo.h"
-
-class SkBitmap;
-class SkCanvas;
+#include "SkPaint.h"
+#include "SkTypeface.h"
 
 namespace sk_tool_utils {
 
+    extern bool gEnablePortableTypeface;
+
     const char* colortype_name(SkColorType);
 
     /**
+     * Sets the paint to use a platform-independent text renderer.
+     */
+    void set_portable_typeface(SkPaint* paint, SkTypeface::Style style = SkTypeface::kNormal);
+
+    /**
      *  Call canvas->writePixels() by using the pixels from bitmap, but with an info that claims
      *  the pixels are colorType + alphaType
      */