Remove SkAutoTUnref and SkAutoTDelete from public includes.

tools/gpu/vk/VkTestContext.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef VkTestContext_DEFINED
 #define VkTestContext_DEFINED
 
 #include "TestContext.h"
 
 #ifdef SK_VULKAN
 
 #include "vk/GrVkBackendContext.h"
 
 namespace sk_gpu_test {
 class VkTestContext : public TestContext {
 public:
     virtual GrBackend backend() override { return kVulkan_GrBackend; }
     virtual GrBackendContext backendContext() override {
         return reinterpret_cast<GrBackendContext>(fVk.get());
     }
 
     bool isValid() const override { return NULL != this->vk(); }
 
-    const GrVkInterface* vk() const { return fVk->fInterface; }
+    const GrVkInterface* vk() const { return fVk->fInterface.get(); }
 
 protected:
     VkTestContext(sk_sp<const GrVkBackendContext> vk) : fVk(std::move(vk)) {}
 
     sk_sp<const GrVkBackendContext> fVk;
 
 private:
     typedef TestContext INHERITED;
 };
 
 /**
  * Creates Vk context object bound to the native Vk library.
  */
 VkTestContext* CreatePlatformVkTestContext();
 
 }  // namespace sk_gpu_test
 
 #endif
 
 #endif