All BufferVk methods need to honor the abstraction provided by mapRangeImpl and unmapImpl. Do not map BufferVk::mBuffer directly, this is needed for when we support device local buffers that cannot be CPU mapped. Bug: angleproject:5909 Change-Id: I520e5cc0994560a3784b8978e349550211dc2cde Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2862559Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
