Fix vulkan layer callback bug

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1870673002

Review URL: https://codereview.chromium.org/1870673002
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index e35a814..e1e99ed 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -95,7 +95,7 @@
         callbackCreateInfo.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT;
         callbackCreateInfo.pNext = nullptr;
         callbackCreateInfo.flags = VK_DEBUG_REPORT_ERROR_BIT_EXT |
-                                   VK_DEBUG_REPORT_WARNING_BIT_EXT;// |
+                                   VK_DEBUG_REPORT_WARNING_BIT_EXT |
                                    //VK_DEBUG_REPORT_INFORMATION_BIT_EXT |
                                    //VK_DEBUG_REPORT_DEBUG_BIT_EXT |
                                    VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT;