use platform-independent font for gm

gm/degeneratesegments.cpp

Index: gm/degeneratesegments.cpp
diff --git a/gm/degeneratesegments.cpp b/gm/degeneratesegments.cpp
index e8de51561dd77670dd13edda2dd3e11cda6c9be1..17bf83bddcba985037b2b040ca140ae5fb33b010 100644
--- a/gm/degeneratesegments.cpp
+++ b/gm/degeneratesegments.cpp
@@ -291,6 +291,7 @@ protected:
         SkPaint titlePaint;
         titlePaint.setColor(SK_ColorBLACK);
         titlePaint.setAntiAlias(true);
+        sk_tool_utils::set_portable_typeface(&titlePaint);
         titlePaint.setLCDRenderText(true);
         titlePaint.setTextSize(15 * SK_Scalar1);
         const char title[] = "Random Paths Drawn Into Rectangle Clips With "
@@ -351,6 +352,7 @@ protected:
                 SkPaint labelPaint;
                 labelPaint.setColor(color);
                 labelPaint.setAntiAlias(true);
+                sk_tool_utils::set_portable_typeface(&labelPaint);
                 labelPaint.setLCDRenderText(true);
                 labelPaint.setTextSize(10 * SK_Scalar1);
                 canvas->drawText(style.fName,