5337fc001e
Note: need new package:js release before merging this in (https://github.com/dart-lang/sdk/issues/24623). Maybe it's time to think again about sneaking JsName + JsPeerInterface into it? (https://github.com/dart-lang/dev_compiler/issues/135) BUG=https://github.com/dart-lang/dev_compiler/issues/310 R=jmesserly@google.com Review URL: https://codereview.chromium.org/1424133007 .