add CSS Transforms types (#688)

Author: saschanaz

baselines/dom.generated.d.ts

@@ -2890,8 +2890,9 @@ interface CSSStyleDeclaration {
     textUnderlinePosition: string | null;
     top: string | null;
     touchAction: string;
-    transform: string | null;
-    transformOrigin: string | null;
+    transform: string;
+    transformBox: string;
+    transformOrigin: string;
     transformStyle: string | null;
     transition: string;
     transitionDelay: string;

inputfiles/idl/CSS Transforms.widl

@@ -0,0 +1,5 @@
+partial interface CSSStyleDeclaration {
+  [CEReactions] attribute [TreatNullAs=EmptyString] CSSOMString transform;
+  [CEReactions] attribute [TreatNullAs=EmptyString] CSSOMString transformOrigin;
+  [CEReactions] attribute [TreatNullAs=EmptyString] CSSOMString transformBox;
+};

inputfiles/idlSources.json

@@ -40,6 +40,10 @@
         "url": "https://www.w3.org/TR/css-transitions-1/",
         "title": "CSS Transitions"
     },
+    {
+        "url": "https://www.w3.org/TR/css-transforms-1/",
+        "title": "CSS Transforms"
+    },
     {
         "url": "https://www.w3.org/TR/css-will-change/",
         "title": "CSS Will Change"