Fix opensource build failure for macos system after patching elemental2/dom/w3c_css.js to exclude collided StylePropertyMapReadonly.

PiperOrigin-RevId: 767673291

Author: mollyibot

java/elemental2/dom/BUILD

@@ -45,6 +45,16 @@ patch_extern_file(
     patch_file = "w3c_rtc.js.diff",
 )
 
+# Patch for w3c_css.js:
+#   - Exclude StylePropertyMapReadonly api that are not released.
+# TODO(b/422164865): Remove the patch when a new jscompiler release containing the change is
+# installed.
+patch_extern_file(
+    name = "w3c_css_patched",
+    src = "//third_party:w3c_css.js",
+    patch_file = "w3c_css.js.diff",
+)
+
 filegroup(
     name = "externs",
     srcs = [
@@ -67,7 +77,7 @@ filegroup(
         ":window_patched",
         "//third_party:w3c_range.js",
         "//third_party:w3c_geometry1.js",
-        "//third_party:w3c_css.js",
+        ":w3c_css_patched",
         "//third_party:w3c_css3d.js",
         "//third_party:w3c_xml.js",
         "//third_party:flash.js",

java/elemental2/dom/w3c_css.js.diff

@@ -0,0 +1,42 @@
+299,324d298
+< 
+< /**
+<  * @constructor
+<  * @see https://developer.mozilla.org/docs/Web/API/StylePropertyMap
+<  */
+< function StylePropertyMapReadonly() {}
+< 
+< /**
+<  * @const {number}
+<  * @see https://developer.mozilla.org/docs/Web/API/StylePropertyMapReadOnly/size
+<  */
+< StylePropertyMapReadonly.prototype.size;
+< 
+< /**
+<  * @param {string} property
+<  * @return {(!CSSStyleValue|undefined)}
+<  * @see https://developer.mozilla.org/docs/Web/API/StylePropertyMapReadOnly/get
+<  */
+< StylePropertyMapReadonly.prototype.get = function(property) {}
+< 
+< /**
+<  * @param {string} property
+<  * @return {!Array<!CSSStyleValue>}
+<  * @see https://developer.mozilla.org/docs/Web/API/StylePropertyMapReadOnly/getAll
+<  */
+< StylePropertyMapReadonly.prototype.getAll = function(property) {}
+327,340d300
+<  * @param {string} property
+<  * @return {boolean}
+<  * @see https://developer.mozilla.org/docs/Web/API/StylePropertyMapReadOnly/has
+<  */
+< StylePropertyMapReadonly.prototype.has = function(property) {}
+< 
+< /**
+<  * @param {function(!Array<!CSSStyleValue>, string, !StylePropertyMapReadOnly): void} callbackfn
+<  * @param {*=} opt_thisArg
+<  * @see https://developer.mozilla.org/docs/Web/API/StylePropertyMapReadOnly/forEach
+<  */
+< StylePropertyMapReadonly.prototype.forEach = function(callbackfn, opt_thisArg) {}
+< 
+< /**