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/tests/GrOpListFlushTest.cpp b/tests/GrOpListFlushTest.cpp
index 7e1f7ad..f53a7e6 100644
--- a/tests/GrOpListFlushTest.cpp
+++ b/tests/GrOpListFlushTest.cpp
@@ -27,7 +27,7 @@
 
 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(GrOpListFlushCount, reporter, ctxInfo) {
     GrContext* context = ctxInfo.grContext();
-    GrGpu* gpu = context->contextPriv().getGpu();
+    GrGpu* gpu = context->priv().getGpu();
 
     SkImageInfo imageInfo = SkImageInfo::Make(1000, 1, kRGBA_8888_SkColorType, kPremul_SkAlphaType);