services/ui: Add mojom API for creating/destroying gpu memory buffer.
Add struct-traits for gpu::SurfaceHandle, and use that to provide mojom API
for creating/destroying gpu memory buffer. This allows removing the direct
dependency of gpu code from ws code (which is a pre-requisite for the gpu
process split).
BUG=637923
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Review-Url: https://codereview.chromium.org/2360203003
Cr-Commit-Position: refs/heads/master@{#421201}
15 files changed
