DefineOwnProperty

DefineOwnProperty

[1] Merge pull request #120 from Ms2ger/DefineOwnProperty ( (heycam著, )) <https://github.com/heycam/webidl/commit/1d575a6e4a28953c29eb96e73dad460da6e25164>

[2] Handle Symbols correctly in legacy platform object's [[DefineOwnPrope… (TimothyGu著, ) <https://github.com/heycam/webidl/commit/c062489e7289c1614f695599783af3f8dbe6ef9e>