[scenic] Track rare/unexpected events in Cobalt.

The initial example is lazy generation of Vulkan pipelines
even though we expected to construct them all up-front.

Change-Id: I632e30d4046754db35e351d3bb465e4e8cfea123
1 file changed
tree: a92f99d2aebea7308da7207d1fdba109a571f629
  1. cobalt_internal/
  2. fuchsia/
  3. .gitignore
  4. BUILD.gn
  5. check.py
  6. OWNERS
  7. projects.yaml