Convert all raw pointers in Renderer11 to ComPtr In preparation for refactoring of device caps, found a couple of memory leaks in error conditions due to incorrect COM lifetime management. Rather than wrestle with manual AddRef/Release during the refactoring, decided to first convert all manual AddRef/Release to angle::ComPtr. Bug: angleproject:8041 Change-Id: I1211fcd0afd0c629793cebd3051b98fbece70a26 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4292695 Commit-Queue: Rafael Cintron <rafael.cintron@microsoft.com> Reviewed-by: Geoff Lang <geofflang@chromium.org>