Only log D3D11 annotations from the thread used to initialize the annotator. Chrome makes some ANGLE calls from multiple threads for initializing WebXR buffers which breaks the assumption that DebugAnnotator11 is only called from a single thread. Work around this by only allowing DebugAnnotator11 to log annotations from the thread used to initialize it. BUG=995888 BUG=972914 Change-Id: I2241e078031633cafea470f85b7b1ecf1fba8466 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1769057 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>