Use SkTextEncoding enum instead of macros.

Change-Id: I4b6259590fa0693ee0522b4999a1c0fe250b173d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/212504
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
diff --git a/gm/annotated_text.cpp b/gm/annotated_text.cpp
index 86da9a0..5d21d15 100644
--- a/gm/annotated_text.cpp
+++ b/gm/annotated_text.cpp
@@ -24,14 +24,14 @@
         SkScalar x, SkScalar y, const SkFont& font, const char* url) {
     size_t byteLength = strlen(static_cast<const char*>(text));
     SkRect bounds;
-    (void)font.measureText(text, byteLength, kUTF8_SkTextEncoding, &bounds);
+    (void)font.measureText(text, byteLength, SkTextEncoding::kUTF8, &bounds);
     bounds.offset(x, y);
     sk_sp<SkData> urlData(SkData::MakeWithCString(url));
     SkAnnotateRectWithURL(canvas, bounds, urlData.get());
     SkPaint shade;
     shade.setColor(0x80346180);
     canvas->drawRect(bounds, shade);
-    canvas->drawSimpleText(text, byteLength, kUTF8_SkTextEncoding, x, y, font, SkPaint());
+    canvas->drawSimpleText(text, byteLength, SkTextEncoding::kUTF8, x, y, font, SkPaint());
 }
 
 DEF_SIMPLE_GM(annotated_text, canvas, 512, 512) {