Remove AttachmentInfo from VulkanViewer setup

tools/vulkan/Window.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 Window_DEFINED
 #define Window_DEFINED
 
@@ skipping 10 matching lines @@
     virtual ~Window() {};
 
     virtual void setTitle(const char*) = 0;
     virtual void show() = 0;
     virtual void inval() = 0;
 
     virtual bool scaleContentToFit() const { return false; }
     virtual bool supportsContentRect() const { return false; }
     virtual SkRect getContentRect() { return SkRect::MakeEmpty(); }
 
-    struct AttachmentInfo {
-        int fSampleCount;
-        int fStencilBits;
-    };
-
     enum BackEndType {
         kNativeGL_BackendType,
         kVulkan_BackendType
     };
 
-    virtual bool attach(BackEndType attachType, int msaaSampleCount, AttachmentInfo*) = 0;
+    virtual bool attach(BackEndType attachType, int msaaSampleCount) = 0;
     void detach();
 
     // input handling
     enum Key {
         kNONE_Key,    //corresponds to android's UNKNOWN
 
         kLeftSoftKey_Key,
         kRightSoftKey_Key,
 
         kHome_Key,    //!< the home key - added to match android
@@ skipping 92 matching lines @@
     OnMouseFunc  fMouseFunc;
     void*        fMouseUserData;
     OnPaintFunc  fPaintFunc;
     void*        fPaintUserData;
 
     VulkanTestContext* fTestContext;
 };
 
 
 #endif