Test CSS.forcePseudoStates method for specific pseudo states
States before forcing pseudo states:

States for div:
--enabled-applied='false'
--disabled-applied='false'
--valid-applied='false'
--invalid-applied='false'
--user-valid-applied='false'
--user-invalid-applied='false'
--required-applied='false'
--optional-applied='false'
--read-only-applied='true'
--read-write-applied='false'
--in-range-applied='false'
--out-of-range-applied='false'
--checked-applied='false'
--indeterminate-applied='false'
--placeholder-shown-applied='false'
--autofill-applied='false'
--open-applied='false'

States for editableDiv:
--read-only-applied='false'

States after forcing pseudo states:

States for div:
--enabled-applied='true'
--disabled-applied='true'
--valid-applied='true'
--invalid-applied='true'
--user-valid-applied='true'
--user-invalid-applied='true'
--required-applied='true'
--optional-applied='true'
--read-only-applied='true'
--read-write-applied='true'
--in-range-applied='true'
--out-of-range-applied='true'
--checked-applied='true'
--indeterminate-applied='true'
--placeholder-shown-applied='true'
--autofill-applied='true'
--open-applied='true'

States for editableDiv:
--read-only-applied='true'
Didn't fail after disabling the CSS agent (https://crbug.com/1123526).