Remove SkAutoTUnref and SkAutoTDelete from public includes.

src/gpu/GrContext.cpp

Index: src/gpu/GrContext.cpp
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index a0884f9274964dba1c52034ced82be0ea567d95e..dfb2fce2790a7d678e6b3dca2aedef470b2cf0b5 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -132,11 +132,11 @@ GrContext::~GrContext() {
     fCaps->unref();
 }
 
-GrContextThreadSafeProxy* GrContext::threadSafeProxy() {
+sk_sp<GrContextThreadSafeProxy> GrContext::threadSafeProxy() {
     if (!fThreadSafeProxy) {
-        fThreadSafeProxy.reset(new GrContextThreadSafeProxy(fCaps, this->uniqueID()));
+        fThreadSafeProxy.reset(new GrContextThreadSafeProxy(sk_ref_sp(fCaps), this->uniqueID()));
     }
-    return SkRef(fThreadSafeProxy.get());
+    return fThreadSafeProxy;
 }
 
 void GrContext::abandonContext() {