D3D: Check for error before createTextureStorageEGLImage. Previously we were just dumping any unexpected errors here. Fix this by passing in the RT explicitly in the constructor, although we still store the EGLImage pointer in case the RT changes. BUG=angleproject:1455 Change-Id: Ie4d4a07c3a7b3a5ccc0a43c4e80bfc6ee43a676b Reviewed-on: https://chromium-review.googlesource.com/365411 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>