Update min Vulkan version to 1.0.8.0, and fix various bugs

src/gpu/vk/GrVkBackendContext.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "vk/GrVkBackendContext.h"
 #include "vk/GrVkExtensions.h"
 #include "vk/GrVkInterface.h"
 #include "vk/GrVkUtil.h"
 
 ////////////////////////////////////////////////////////////////////////////////
 // Helper code to set up Vulkan context objects
 
 #ifdef ENABLE_VK_LAYERS
 const char* kDebugLayerNames[] = {
     // elements of VK_LAYER_LUNARG_standard_validation
-    "VK_LAYER_LUNARG_threading",
-    "VK_LAYER_LUNARG_param_checker",
+    "VK_LAYER_GOOGLE_threading",
+    "VK_LAYER_LUNARG_parameter_validation",
     "VK_LAYER_LUNARG_device_limits",
     "VK_LAYER_LUNARG_object_tracker",
     "VK_LAYER_LUNARG_image",
-    "VK_LAYER_LUNARG_mem_tracker",
-    "VK_LAYER_LUNARG_draw_state",
+    "VK_LAYER_LUNARG_core_validation",
     "VK_LAYER_LUNARG_swapchain",
-    //"VK_LAYER_GOOGLE_unique_objects",
+    "VK_LAYER_GOOGLE_unique_objects",
     // not included in standard_validation
     //"VK_LAYER_LUNARG_api_dump",
     //"VK_LAYER_LUNARG_vktrace",
     //"VK_LAYER_LUNARG_screenshot",
 };
 #endif
 
 // the minimum version of Vulkan supported
-const uint32_t kGrVkMinimumVersion = VK_MAKE_VERSION(1, 0, 3);
+const uint32_t kGrVkMinimumVersion = VK_MAKE_VERSION(1, 0, 8);
 
 // Create the base Vulkan objects needed by the GrVkGpu object
 const GrVkBackendContext* GrVkBackendContext::Create() {
     VkPhysicalDevice physDev;
     VkDevice device;
     VkInstance inst;
     VkResult err;
 
     const VkApplicationInfo app_info = {
         VK_STRUCTURE_TYPE_APPLICATION_INFO, // sType
@@ skipping 190 matching lines @@
     return ctx;
 }
 
 GrVkBackendContext::~GrVkBackendContext() {
     vkDeviceWaitIdle(fDevice);
     vkDestroyDevice(fDevice, nullptr);
     fDevice = VK_NULL_HANDLE;
     vkDestroyInstance(fInstance, nullptr);
     fInstance = VK_NULL_HANDLE;
 }