Media Capabilities: add MediaDecodingConfiguration.idl and update to Spec (#5548)

This CL shuffles around the idl data structures to match
the current Spec status, namely:
- gets MediaType and |type| out of MediaConfiguration(.idl)
- adds them to a new file MediaDecodingConfiguration(.idl),
 as MediaDecodingType |type|. MediaDecodingConfiguration
 derives from MediaConfiguration.

LayoutTests updated accordingly.

BUG=709181, 690380

Review-Url: https://codereview.chromium.org/2813133002
Cr-Commit-Position: refs/heads/master@{#464057}



View on GitHub: https://github.com/w3c/web-platform-tests/pull/5548

Received on Wednesday, 12 April 2017 17:19:18 UTC