Rename GrContextPriv to GrDirectContextPriv

Change-Id: I3fccadd8a2860dbee73f93f995738146373f8a39
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/326196
Commit-Queue: Adlai Holler <adlai@google.com>
Auto-Submit: Adlai Holler <adlai@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/samplecode/SampleChineseFling.cpp b/samplecode/SampleChineseFling.cpp
index a9acef6..74c9ebc 100644
--- a/samplecode/SampleChineseFling.cpp
+++ b/samplecode/SampleChineseFling.cpp
@@ -18,7 +18,7 @@
 
 #if SK_SUPPORT_GPU
 #include "include/gpu/GrDirectContext.h"
-#include "src/gpu/GrContextPriv.h"
+#include "src/gpu/GrDirectContextPriv.h"
 #endif
 
 static sk_sp<SkTypeface> chinese_typeface() {