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/text/GrTextContext.cpp b/src/gpu/text/GrTextContext.cpp
index 5169496..bf6b239 100644
--- a/src/gpu/text/GrTextContext.cpp
+++ b/src/gpu/text/GrTextContext.cpp
@@ -216,10 +216,10 @@
     }
 
     const GrBackendFormat format =
-            context->contextPriv().caps()->getBackendFormatFromColorType(kRGBA_8888_SkColorType);
+            context->priv().caps()->getBackendFormatFromColorType(kRGBA_8888_SkColorType);
 
     // Setup dummy SkPaint / GrPaint / GrRenderTargetContext
-    sk_sp<GrRenderTargetContext> rtc(context->contextPriv().makeDeferredRenderTargetContext(
+    sk_sp<GrRenderTargetContext> rtc(context->priv().makeDeferredRenderTargetContext(
         format, SkBackingFit::kApprox, 1024, 1024, kRGBA_8888_GrPixelConfig, nullptr));
 
     SkMatrix viewMatrix = GrTest::TestMatrixInvertible(random);