I've got a patch to do part of this (allow this type of GpuMemoryBuffer to be transmitted cross-process) at https://codereview.chromium.org/2970353002/ , though I don't think I'll be able to complete it.

That only allows taking DXGI GpuMemoryBuffers that are drawn in the client and displaying them in an overlay in the GPU process. I'm not sure what exactly you'd want to do with them.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e

commit b54509c3db126e5a3ed9b84fa70df1f821b1fd3e
Author: Bill Orr <billorr@chromium.org>
Date: Thu Oct 26 21:57:30 2017

Extend GpuMemoryBuffer to support DirectX textures

This change adds support to GpuMemoryBuffer for shared handles to
ID3D11Texture2D (D3D11_RESOURCE_MISC_SHARED_NTHANDLE), and support to
bind GLImages using these handles.

BUG= 731791 

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;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
Change-Id: I29ee224db99866fbb4baaf81fbd6a3202ca6dafa
Reviewed-on: https://chromium-review.googlesource.com/674135
Commit-Queue: Bill Orr <billorr@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: David Reveman <reveman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#511981}
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/components/viz/host/server_gpu_memory_buffer_manager_unittest.cc
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/BUILD.gn
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/client/BUILD.gn
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/client/gpu_memory_buffer_impl.cc
[add] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/client/gpu_memory_buffer_impl_dxgi.cc
[add] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/client/gpu_memory_buffer_impl_dxgi.h
[add] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/client/gpu_memory_buffer_impl_dxgi_unittest.cc
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/client/gpu_memory_buffer_impl_test_template.h
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/common/gpu_memory_buffer_support.cc
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/host/gpu_memory_buffer_support.cc
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/service/BUILD.gn
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/service/direct_composition_surface_win_unittest.cc
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/service/gpu_memory_buffer_factory.cc
[add] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/service/gpu_memory_buffer_factory_dxgi.cc
[add] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/service/gpu_memory_buffer_factory_dxgi.h
[add] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/service/gpu_memory_buffer_factory_dxgi_unittest.cc
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/gpu/ipc/service/gpu_memory_buffer_factory_test_template.h
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/ui/gfx/gpu_memory_buffer.cc
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/ui/gfx/gpu_memory_buffer.h
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/ui/gfx/mojo/buffer_types.mojom
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/ui/gfx/mojo/buffer_types_struct_traits.cc
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/ui/gfx/mojo/buffer_types_struct_traits.h
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/ui/gl/BUILD.gn
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/ui/gl/gl_image_dxgi.cc
[modify] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/ui/gl/gl_image_dxgi.h
[add] https://crrev.com/b54509c3db126e5a3ed9b84fa70df1f821b1fd3e/ui/gl/gl_image_dxgi_unittest.cc