Move more internal methods from GrContext to GrContextPriv

TBR=bsalomon@google.com
Change-Id: Ia8cf0e0d30451c69bc7a08215aafa6abe6e0ddbe
Reviewed-on: https://skia-review.googlesource.com/97080
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
diff --git a/tests/WritePixelsTest.cpp b/tests/WritePixelsTest.cpp
index a41e8f4..a16752f 100644
--- a/tests/WritePixelsTest.cpp
+++ b/tests/WritePixelsTest.cpp
@@ -427,10 +427,11 @@
 
 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(WritePixelsNonTexture_Gpu, reporter, ctxInfo) {
     GrContext* context = ctxInfo.grContext();
+    GrGpu* gpu = context->contextPriv().getGpu();
 
     for (auto& origin : { kTopLeft_GrSurfaceOrigin, kBottomLeft_GrSurfaceOrigin }) {
         for (int sampleCnt : {0, 4}) {
-            GrBackendTexture backendTex = context->getGpu()->createTestingOnlyBackendTexture(
+            GrBackendTexture backendTex = gpu->createTestingOnlyBackendTexture(
                     nullptr, DEV_W, DEV_H, kSkia8888_GrPixelConfig, true, GrMipMapped::kNo);
             SkColorType colorType;
             if (kRGBA_8888_GrPixelConfig == kSkia8888_GrPixelConfig) {
@@ -441,14 +442,14 @@
             sk_sp<SkSurface> surface(SkSurface::MakeFromBackendTextureAsRenderTarget(
                     context, backendTex, origin, sampleCnt, colorType, nullptr, nullptr));
             if (!surface) {
-                context->getGpu()->deleteTestingOnlyBackendTexture(&backendTex);
+                gpu->deleteTestingOnlyBackendTexture(&backendTex);
                 continue;
             }
 
             test_write_pixels(reporter, surface.get());
 
             surface.reset();
-            context->getGpu()->deleteTestingOnlyBackendTexture(&backendTex);
+            gpu->deleteTestingOnlyBackendTexture(&backendTex);
         }
     }
 }