Rename ThrowName to NamedError and add a message argument, so it's usable in reject() calls.
Rename ThrowName to NamedError and add a message argument, so it's usable in reject() calls.

Also add names for a few more errors.

appsup/chrome-app-polyfill,appsup/chrome-app-polyfill,jyasskin/chrome-app-polyfill