[typedom] Still expose CSSStyleValue and StylePropertyMapReadOnly to PaintWorklet

Reverts part of https://chromium-review.googlesource.com/c/chromium/src/+/920326

If TypedOM doesn't ship in 66 this means that we won't break paint
worklet. (We still need to expose these two classes).

Bug: 812432
Change-Id: I358d49fecdf2169911c72dac758a745067dd5c96
Reviewed-on: https://chromium-review.googlesource.com/924604
Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: nainar <nainar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537503}

third_party/WebKit/Source/core/css/cssom/CSSStyleValue.idl

@@ -7,8 +7,7 @@
 // base CSSStyleValues.
 // Spec: https://drafts.css-houdini.org/css-typed-om/#stylevalue-objects
 [
-  RuntimeEnabled=CSSTypedOM,
-  Exposed=(Window,PaintWorklet)
+  Exposed(Window CSSTypedOM,PaintWorklet CSSPaintAPI)
 ] interface CSSStyleValue {
   stringifier;
   // Putting Exposed=Window in the next line makes |parse| not exposed to PaintWorklet.

third_party/WebKit/Source/core/css/cssom/StylePropertyMapReadOnly.idl

@@ -3,8 +3,7 @@
 // found in the LICENSE file.
 
 [
-    RuntimeEnabled=CSSTypedOM,
-    Exposed=(Window,PaintWorklet)
+    Exposed(Window CSSTypedOM,PaintWorklet CSSPaintAPI)
 ] interface StylePropertyMapReadOnly {
     [RaisesException] CSSStyleValue? get(DOMString property);
     [RaisesException] sequence<CSSStyleValue> getAll(DOMString property);