Strip meta tags from pasted links in Chromium (#36356)

* Strip meta tag

* Corrections for accuracy

* Simply by avoiding regex

Author: getdave

packages/block-editor/src/components/rich-text/use-paste-handler.js

@@ -91,6 +91,9 @@ export function usePasteHandler( props ) {
 			// Remove Windows-specific metadata appended within copied HTML text.
 			html = removeWindowsFragments( html );
 
+			// Strip meta tag.
+			html = removeCharsetMetaTag( html );
+
 			event.preventDefault();
 
 			// Allows us to ask for this information when we get a report.
@@ -257,3 +260,22 @@ function removeWindowsFragments( html ) {
 
 	return html.replace( startReg, '' ).replace( endReg, '' );
 }
+
+/**
+ * Removes the charset meta tag inserted by Chromium.
+ * See:
+ * - https://github.com/WordPress/gutenberg/issues/33585
+ * - https://bugs.chromium.org/p/chromium/issues/detail?id=1264616#c4
+ *
+ * @param {string} html the html to be stripped of the meta tag.
+ * @return {string} the cleaned html
+ */
+function removeCharsetMetaTag( html ) {
+	const metaTag = `<meta charset='utf-8'>`;
+
+	if ( html.startsWith( metaTag ) ) {
+		return html.slice( metaTag.length );
+	}
+
+	return html;
+}