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/samplecode/SampleAnimatedImage.cpp b/samplecode/SampleAnimatedImage.cpp
index d603259..eabce6b 100644
--- a/samplecode/SampleAnimatedImage.cpp
+++ b/samplecode/SampleAnimatedImage.cpp
@@ -38,10 +38,10 @@
                 kPauseKey, kResetKey);
         const char* text = str.c_str();
         SkRect bounds;
-        font.measureText(text, strlen(text), kUTF8_SkTextEncoding, &bounds);
+        font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds);
         fYOffset = bounds.height();
 
-        canvas->drawSimpleText(text, strlen(text), kUTF8_SkTextEncoding, 5, fYOffset, font, SkPaint());
+        canvas->drawSimpleText(text, strlen(text), SkTextEncoding::kUTF8, 5, fYOffset, font, SkPaint());
         fYOffset *= 2;
     }