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/tools/gpu/GrTest.cpp b/tools/gpu/GrTest.cpp
index f511574..25c5a60 100644
--- a/tools/gpu/GrTest.cpp
+++ b/tools/gpu/GrTest.cpp
@@ -148,7 +148,7 @@
 }
 
 sk_sp<SkImage> GrContext::getFontAtlasImage_ForTesting(GrMaskFormat format) {
-    GrAtlasGlyphCache* cache = this->getAtlasGlyphCache();
+    GrAtlasGlyphCache* cache = this->contextPriv().getAtlasGlyphCache();
 
     const sk_sp<GrTextureProxy>* proxies = cache->getProxies(format);
     if (!proxies[0]) {