Context virtualization for D3D11 queries Queries in D3D11 are now virtualized such that they work as expected with multiple contexts. Timer queries now only time the operations that their context is responsible for and the operations of other contexts are ignored. BUG=angleproject:657 Change-Id: I667de594bdb5831d126d5801c0e692ded4c88bf4 Reviewed-on: https://chromium-review.googlesource.com/327150 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Ian Ewell <ewell@google.com>