Implement Vulkan GrBackendObject for textures.

src/gpu/vk/GrVkRenderTarget.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrVkRenderTarget_DEFINED
 #define GrVkRenderTarget_DEFINED
 
 #include "GrVkImage.h"
 #include "GrRenderTarget.h"
 
 #include "GrVkRenderPass.h"
 
 class GrVkCommandBuffer;
 class GrVkFramebuffer;
 class GrVkGpu;
 class GrVkImageView;
 class GrVkStencilAttachment;
 
+struct GrVkTextureInfo;
+
 #ifdef SK_BUILD_FOR_WIN
 // Windows gives bogus warnings about inheriting asTexture/asRenderTarget via dominance.
 #pragma warning(push)
 #pragma warning(disable: 4250)
 #endif
 
 class GrVkRenderTarget: public GrRenderTarget, public virtual GrVkImage {
 public:
     static GrVkRenderTarget* CreateNewRenderTarget(GrVkGpu*, const GrSurfaceDesc&,
                                                    GrGpuResource::LifeCycle,
                                                    const GrVkImage::ImageDesc&);
 
     static GrVkRenderTarget* CreateWrappedRenderTarget(GrVkGpu*, const GrSurfaceDesc&,
                                                        GrGpuResource::LifeCycle,
-                                                       const GrVkImage::Resource* resource);
+                                                       const GrVkTextureInfo*);
 
     ~GrVkRenderTarget() override;
 
     const GrVkFramebuffer* framebuffer() const { return fFramebuffer; }
     const GrVkImageView* colorAttachmentView() const { return fColorAttachmentView; }
     const GrVkImage::Resource* msaaImageResource() const { return fMSAAImageResource; }
     const GrVkImageView* resolveAttachmentView() const { return fResolveAttachmentView; }
     const GrVkImage::Resource* stencilImageResource() const;
     const GrVkImageView* stencilAttachmentView() const;
 
@@ skipping 80 matching lines @@
     const GrVkImage::Resource* fMSAAImageResource;
     const GrVkImageView*       fResolveAttachmentView;
     int                        fColorValuesPerPixel;
     
     // This is a cached pointer to a simple render pass. The render target should unref it
     // once it is done with it.
     const GrVkRenderPass*      fCachedSimpleRenderPass;
 };
 
 #endif