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/tools/viewer/Viewer.cpp b/tools/viewer/Viewer.cpp
index 2ea6302..75730ca 100644
--- a/tools/viewer/Viewer.cpp
+++ b/tools/viewer/Viewer.cpp
@@ -1584,7 +1584,7 @@
                         ImGui::RadioButton("Software", true);
                     } else if (fWindow->sampleCount() > 1) {
                         prButton(GpuPathRenderers::kAll);
-                        if (ctx->contextPriv().caps()->shaderCaps()->pathRenderingSupport()) {
+                        if (ctx->priv().caps()->shaderCaps()->pathRenderingSupport()) {
                             prButton(GpuPathRenderers::kStencilAndCover);
                         }
                         prButton(GpuPathRenderers::kTessellating);
@@ -1592,7 +1592,7 @@
                     } else {
                         prButton(GpuPathRenderers::kAll);
                         if (GrCoverageCountingPathRenderer::IsSupported(
-                                    *ctx->contextPriv().caps())) {
+                                    *ctx->priv().caps())) {
                             prButton(GpuPathRenderers::kCoverageCounting);
                         }
                         prButton(GpuPathRenderers::kSmall);
@@ -2074,7 +2074,7 @@
             if (!ctx) {
                 writer.appendString("Software");
             } else {
-                const auto* caps = ctx->contextPriv().caps();
+                const auto* caps = ctx->priv().caps();
 
                 writer.appendString(gPathRendererNames[GpuPathRenderers::kAll].c_str());
                 if (fWindow->sampleCount() > 1) {