OS: Win10, not sure if repros on other platforms

When building I get the following error:

D:\src\chromium\src>ninja -C out\dbg
ninja: Entering directory `out\dbg'
[1/1] Regenerating ninja files
[3424/20480] CXX obj/media/mojo/services/services/mojo_renderer_service.obj
FAILED: obj/media/mojo/services/services/mojo_renderer_service.obj
ninja -t msvc -e environment.x64 -- "d:\src\depot_tools\win_toolchain\vs_files\95ddda401ec5678f15eeed01d2bee08fcbc5ee97\VC\bin\amd64/cl.exe" /nologo /showIncludes /FC @obj/media/mojo/services/services/mojo_renderer_service.obj.rsp /c ../../media/mojo/services/mojo_renderer_service.cc /Foobj/media/mojo/services/services/mojo_renderer_service.obj /Fd"obj/media/mojo/services/services_cc.pdb"
d:\src\chromium\src\media\mojo\services\mojo_renderer_service.h(33): error C2220: warning treated as error - no 'object' file generated
d:\src\chromium\src\media\mojo\services\mojo_renderer_service.h(33): warning C4275: non dll-interface class 'media::mojom::Renderer' used as base for dll-interface class 'media::MojoRendererService'
d:\src\chromium\src\out\dbg\gen\media\mojo\interfaces\renderer.mojom.h(78): note: see declaration of 'media::mojom::Renderer'
d:\src\chromium\src\media\mojo\services\mojo_renderer_service.h(33): note: see declaration of 'media::MojoRendererService'
[3473/20480] CXX obj/media/test/mojo_pipeline_integration_tests/pipeline_integration_test.obj
ninja: build stopped: subcommand failed.