Resolve remaining issues from bugzilla

[Ms2ger]

• Using platform object example

• consider allowing non-matching enums to be converted to a particular value

• Support subclassing Array

• allow attributes to have different types for their getter and setter

• Function's length property is inconsistent with EcmaScript

• "a value (matching DefaultValue)"

• freeze/seal/preventExtensions should throw for Nodes (and maybe any WebIDL interface)

• "optional any" is nonsense that should be disallowed

• "The return type of the operation is given by th..."

• enum should be able to inherit from another enum

• Why do we disallow overloading across partial interfaces?

• Stop using "octet" now Consider renaming numeric types to match ECMAScript typed arrays #843

• Fixed length sequences of varying types

• " The result of converting an IDL value of any b..."

• "Prose accompanying an interface with a pair ite..."

• factor out "location of properties that usually go on an interface prototype object" wording

• Require that promise rejection are instances of error

• Remove requirement for prose around iterable<> if object has indexed properties

• Allow partial enums -- Allow partial enums #184

• Define context variables, such as "context object"

• Data properties

• Define [LegacyNewObject]

• Support holes or undefined values in the sequences as return values?

• Inherited method name conflicts with consequential maplike/setlike interfaces should fail

• Should probably perform security checks on arguments too, not just this values

• Make BufferSource more convenient to use

• [EnforceRange] accepts an odd set of input values

• iterable declaration and forEach ECMAScript binding issues

• FrozenArray only provides shallow immutability

• Provide text guidance for rejecting promises

[bzbarsky]

I'd love it if someone converted this to separate github issues...