sk_sp for gpu.

include/gpu/GrTypesPriv.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTypesPriv_DEFINED
 #define GrTypesPriv_DEFINED
 
 #include "GrTypes.h"
 #include "SkRect.h"
+#include "SkRefCnt.h"
 
  /**
   * Types of shader-language-specific boxed variables we can create. (Currently only GrGLShaderVars,
   * but should be applicable to other shader languages.)
   */
 enum GrSLType {
     kVoid_GrSLType,
     kFloat_GrSLType,
     kVec2f_GrSLType,
     kVec3f_GrSLType,
@@ skipping 446 matching lines @@
 /**
  * Specifies if the holder owns the backend, OpenGL or Vulkan, object.
  */
 enum class GrBackendObjectOwnership : bool {
     /** Holder does not destroy the backend object. */
     kBorrowed = false,
     /** Holder destroys the backend object. */
     kOwned = true
 };
 
+template <typename T> T * const * sk_sp_address_as_pointer_address(sk_sp<T> const * sp) {
+    static_assert(sizeof(T*) == sizeof(sk_sp<T>), "sk_sp not expected size.");
+    return reinterpret_cast<T * const *>(sp);
+}
+
 #endif