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/src/gpu/GrDrawOpTest.cpp b/src/gpu/GrDrawOpTest.cpp
index d14e5b5..90c6e59 100644
--- a/src/gpu/GrDrawOpTest.cpp
+++ b/src/gpu/GrDrawOpTest.cpp
@@ -16,7 +16,7 @@
 #if GR_TEST_UTILS
 
 const GrUserStencilSettings* GrGetRandomStencil(SkRandom* random, GrContext* context) {
-    if (context->contextPriv().caps()->avoidStencilBuffers()) {
+    if (context->priv().caps()->avoidStencilBuffers()) {
         return &GrUserStencilSettings::kUnused;
     }
     static constexpr GrUserStencilSettings kReads(