Rename GrContext::contextPriv to priv

Mechanical. This makes the priv() accessor the same for all the context types.

Change-Id: I40850eb05a33b8d7cc3eabdd42226d24b2ba58aa
Reviewed-on: https://skia-review.googlesource.com/c/189164
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/samplecode/SampleAnimatedText.cpp b/samplecode/SampleAnimatedText.cpp
index ba46a87..143703c 100644
--- a/samplecode/SampleAnimatedText.cpp
+++ b/samplecode/SampleAnimatedText.cpp
@@ -102,7 +102,7 @@
 #if SK_SUPPORT_GPU
         GrContext* grContext = canvas->getGrContext();
         if (grContext) {
-            sk_sp<SkImage> image = grContext->contextPriv().getFontAtlasImage_ForTesting(
+            sk_sp<SkImage> image = grContext->priv().getFontAtlasImage_ForTesting(
                                                                 GrMaskFormat::kA8_GrMaskFormat);
             canvas->drawImageRect(image,
                                   SkRect::MakeXYWH(512.0f, 10.0f, 512.0f, 512.0f), &paint);