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/gl/GrGLGpuCommandBuffer.cpp b/src/gpu/gl/GrGLGpuCommandBuffer.cpp
index 912ffe7..502c845 100644
--- a/src/gpu/gl/GrGLGpuCommandBuffer.cpp
+++ b/src/gpu/gl/GrGLGpuCommandBuffer.cpp
@@ -28,7 +28,7 @@
                                  const GrGpuRTCommandBuffer::StencilLoadAndStoreInfo& stencilInfo) {
     SkASSERT(fGpu);
     SkASSERT(!fRenderTarget);
-    SkASSERT(fGpu == rt->getContext()->contextPriv().getGpu());
+    SkASSERT(fGpu == rt->getContext()->priv().getGpu());
 
     this->INHERITED::set(rt, origin);
     fColorLoadAndStoreInfo = colorInfo;