There are a couple of synchronization problems with gpu::VulkanSurface and its usage from SkiaRenderer:

(1) there's no barrier to transition image layout to VK_IMAGE_LAYOUT_PRESENT_SRC_KHR before the present
(2) it appears that we're using the swapchain image as a render target without waiting on the acquire semaphore

The first issue completely breaks rendering on fuchsia (see https://chromium-review.googlesource.com/c/chromium/src/+/1188976 for a WIP fix)

Part of the issue is that the code in //gpu/vulkan is extremely simplistic. For example gpu::VulkanSwapchain assumes all accesses to the acquired image can happen from a single command buffer managed by the swap chain and submitted inside SwapBuffers().