Closure compiler: fail on some warnings #32868
Description
Some Closure warnings are errors in AMP's context. Failing compilation for these warnings would help us avoid "obvious" bugs. These include:
- JSC_TYPE_MISMATCH
- JSC_HIDDEN_SUPERCLASS_PROPERTY_MISMATCH
- JSC_UNKNOWN_OVERRIDE
- JSC_UNRECOGNIZED_TYPE_ERROR
An example: #32869
/cc @ampproject/wg-infra