Remove AttachmentInfo from VulkanViewer setup

tools/vulkan/viewer/VulkanViewer.cpp

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "VulkanViewer.h"
 
 #include "GMSlide.h"
@@ skipping 53 matching lines @@
 
     SkDebugf("Command line arguments: ");
     for (int i = 1; i < argc; ++i) {
         SkDebugf("%s ", argv[i]);
     }
     SkDebugf("\n");
 
     SkCommandLineFlags::Parse(argc, argv);
 
     fWindow = Window::CreateNativeWindow(platformData);
-    fWindow->attach(Window::kVulkan_BackendType, 0, nullptr);
+    fWindow->attach(Window::kVulkan_BackendType, 0);
 
     // register callbacks
     fWindow->registerKeyFunc(on_key_handler, this);
     fWindow->registerCharFunc(on_char_handler, this);
     fWindow->registerPaintFunc(on_paint_handler, this);
 
     // set up slides
     this->initSlides();
 
     fAnimTimer.run();
@@ skipping 250 matching lines @@
     // Record measurements
     fMeasurements[fCurrentMeasurement++] = ms;
     fCurrentMeasurement &= (kMeasurementCount - 1);  // fast mod
     SkASSERT(fCurrentMeasurement < kMeasurementCount);
 
     fAnimTimer.updateTime();
     if (fSlides[fCurrentSlide]->animate(fAnimTimer) || fDisplayStats) {
         fWindow->inval();
     }
 }