Revert "Create a child window in SurfaceD3D when needed." Reverting until chromium sandbox issues are resolved. This reverts commit b7f1a8b0ab3489a7463749e7fc088187bfafbd35. BUG=484963 BUG=angleproject:961 Change-Id: I4b030329a322d0a96a18e6ae875d500c5f755ddd Reviewed-on: https://chromium-review.googlesource.com/270490 Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>