If glBufferSubData results in a new vk::BufferHelper allocation, VertexArrayVk::mCurrentElementArrayBuffer needs to be updated. VertexArrayVk::syncState was working under the assumption that DIRTY_BIT_ELEMENT_ARRAY_BUFFER_DATA cannot result in a vk::BufferHelper pointer change. This assumption was broken in https://chromium-review.googlesource.com/c/angle/angle/+/2204655. Bug: b/178231226 Change-Id: I969549c5ffec3456bdc08ac3e03a0fa0e7b4593f (cherry picked from commit bb062070) Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2693346Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>
