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/ops/GrCopySurfaceOp.cpp b/src/gpu/ops/GrCopySurfaceOp.cpp
index 9e3a521..8d8e9f1 100644
--- a/src/gpu/ops/GrCopySurfaceOp.cpp
+++ b/src/gpu/ops/GrCopySurfaceOp.cpp
@@ -81,7 +81,7 @@
         return nullptr;
     }
 
-    GrOpMemoryPool* pool = context->contextPriv().opMemoryPool();
+    GrOpMemoryPool* pool = context->priv().opMemoryPool();
 
     return pool->allocate<GrCopySurfaceOp>(dstProxy, srcProxy, clippedSrcRect, clippedDstPoint);
 }