"CSS" interface needs to be switched to namespace:
https://github.com/w3c/csswg-drafts/pull/437
https://github.com/w3c/css-houdini-drafts/issues/410

yukishiino@, do you have any rough ETA of this feature? I'm thinking to make 'paintWorklet' attribute 'static' ( issue 719303 ) as a stopgap if this needs a long time because this is blocking upstreaming worklet layout tests to the WPT repository ( issue 724907 ).

IIRC, making the attribute 'static' also needs binding changes around the realm (holder?) handling.

peria@ is willing to support IDL namespace.

For static attribute's issue, I've sent out a CL: https://crrev.com/2913403003 , which should land soonish.  Please use static attributes on CSS interface for the time being.

Thank you!! :D

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fd4acd522e94c696bb6e1d177e354e0ccc53ba1c

commit fd4acd522e94c696bb6e1d177e354e0ccc53ba1c
Author: Lisa Suzuki <lisabelle@google.com>
Date: Tue Sep 26 02:34:15 2017

idl_parser: Enable "namespace" to be parsed into ASTs

This CL is a 1st step of supporting "namespace" definition in WebIDL.

In order to check if ASTs are made correctly, I made pattern matching tests.

Bug: 727971
Change-Id: I033e9bab2623675f40a9b941cc53cdecef0c186d
Reviewed-on: https://chromium-review.googlesource.com/676692
Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Kenichi Ishibashi <bashi@chromium.org>
Commit-Queue: Lisa Suzuki <lisabelle@google.com>
Cr-Commit-Position: refs/heads/master@{#504265}
[modify] https://crrev.com/fd4acd522e94c696bb6e1d177e354e0ccc53ba1c/tools/idl_parser/idl_lexer.py
[modify] https://crrev.com/fd4acd522e94c696bb6e1d177e354e0ccc53ba1c/tools/idl_parser/idl_parser.py
[add] https://crrev.com/fd4acd522e94c696bb6e1d177e354e0ccc53ba1c/tools/idl_parser/test_parser/namespace_web.idl

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/fb396f70fdafd36e61eeea88bb174caa95fd8513

commit fb396f70fdafd36e61eeea88bb174caa95fd8513
Author: Hitoshi Yoshida <peria@chromium.org>
Date: Thu Dec 07 07:34:43 2017

bindings: Generate a IDL information collection per component

This CL defines a new set of Web IDL based classes under web_idl/.
Collecitor class is the main API, which reads IDL files and
stacks converted information.

This CL also updates some BUILD.gn files to generate an
intermediate dump file per component, which includes all
information in IDL files in the component.


Bug: 650150, 727971, 579896
Change-Id: Idc98be4485855afc7797b7fc3af21fb7ee68f0ed
Reviewed-on: https://chromium-review.googlesource.com/648534
Commit-Queue: Hitoshi Yoshida <peria@chromium.org>
Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Kenichi Ishibashi <bashi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#522378}
[modify] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/core/BUILD.gn
[modify] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/modules/BUILD.gn
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/generate_web_idl_collection.py
[modify] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/scripts.gni
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/__init__.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/argument.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/attribute.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/callback_function.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/callback_interface.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/collection.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/collector.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/collector_test.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/constant.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/dictionary.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/ecma_script_types.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/enumeration.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/extended_attribute.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/idl_definition_builder.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/idl_types.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/implements.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/interface.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/literal_token.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/namespace.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/operation.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/typedef.py
[add] https://crrev.com/fb396f70fdafd36e61eeea88bb174caa95fd8513/third_party/WebKit/Source/bindings/scripts/web_idl/utilities.py