It's not clear from the Chromium Design Document[1] whether resources loaded via Subresource Integrity (SRI) will have a shared cache or not. It's not explicitly mentioned, so it's probably best to assume it's not until someone has tested it.

[edit] The SRI spec github project has an issue for shared cache [2] that seems to be coming to the consensus that there will not be a shared cache for SRI:

> "it seems rather unlikely that we can ever consider a shared cache"

[1] https://docs.google.com/document/d/1XJMm89oyd4lJ-LDQuy0CudzB...

[2] https://github.com/w3c/webappsec-subresource-integrity/issue...