Remove AttachmentInfo from VulkanViewer setup

tools/vulkan/VulkanTestContext.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 VulkanTestContext_DEFINED
 #define VulkanTestContext_DEFINED
 
@@ skipping 19 matching lines @@
             delete ctx;
             return nullptr;
         }
         return ctx;
     }
 
     SkSurface* getBackbufferSurface();
     void swapBuffers();
 
     bool makeCurrent() { return true; }
-    int getStencilBits() { return 0;  }
-    int getSampleCount() { return 0; }
 
     bool isValid() { return SkToBool(fBackendContext.get()); }
 
     void resize(uint32_t w, uint32_t h) {
         this->createSwapchain(w, h); 
     }
 
     GrBackendContext getBackendContext() { return (GrBackendContext)fBackendContext.get(); }
 
 private:
@@ skipping 55 matching lines @@
     VkImageLayout*    fImageLayouts;   // layouts of these images when not color attachment
     sk_sp<SkSurface>* fSurfaces;       // wrapped surface for those images
     VkCommandPool     fCommandPool;
     BackbufferInfo*   fBackbuffers;
     uint32_t          fCurrentBackbufferIndex;
 };
 
 #endif // SK_VULKAN
 
 #endif