Always add a barrier when old layout was general in vulkan.

src/gpu/vk/GrVkMemory.cpp

Index: src/gpu/vk/GrVkMemory.cpp
diff --git a/src/gpu/vk/GrVkMemory.cpp b/src/gpu/vk/GrVkMemory.cpp
index 1dac9f344094299ca20a288530a7c26e49a8d5f2..48bea9c67ef762774e0ca1a968ae2b6656d4506c 100644
--- a/src/gpu/vk/GrVkMemory.cpp
+++ b/src/gpu/vk/GrVkMemory.cpp
@@ -223,9 +223,11 @@ VkAccessFlags GrVkMemory::LayoutToSrcAccessMask(const VkImageLayout layout) {
     VkAccessFlags flags = 0;;
     if (VK_IMAGE_LAYOUT_GENERAL == layout) {
         flags = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT |
-            VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT |
-            VK_ACCESS_TRANSFER_WRITE_BIT |
-            VK_ACCESS_HOST_WRITE_BIT | VK_ACCESS_HOST_READ_BIT;
+                VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT |
+                VK_ACCESS_TRANSFER_WRITE_BIT |
+                VK_ACCESS_TRANSFER_READ_BIT |
+                VK_ACCESS_SHADER_READ_BIT |
+                VK_ACCESS_HOST_WRITE_BIT | VK_ACCESS_HOST_READ_BIT;
     } else if (VK_IMAGE_LAYOUT_PREINITIALIZED == layout) {
         flags = VK_ACCESS_HOST_WRITE_BIT;
     } else if (VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL == layout) {